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<?php // $Id$
///////////////////////////////////////////////////////////////////////////
// //
// NOTICE OF COPYRIGHT //
// //
// Moodle - Modular Object-Oriented Dynamic Learning Environment //
// http://moodle.com //
// //
// Copyright (C) 2001-2003 Martin Dougiamas http://dougiamas.com //
// //
// This program is free software; you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation; either version 2 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details: //
// //
// http://www.gnu.org/copyleft/gpl.html //
// //
///////////////////////////////////////////////////////////////////////////
/**
* Library of functions for web output
*
* Library of all general-purpose Moodle PHP functions and constants
* that produce HTML output
*
* Other main libraries:
* - datalib.php - functions that access the database.
* - moodlelib.php - general-purpose Moodle functions.
* @author Martin Dougiamas
* @version $Id$
* @license http://www.gnu.org/copyleft/gpl.html GNU Public License
* @package moodlecore
*/
/// Constants
/// Define text formatting types ... eventually we can add Wiki, BBcode etc
/**
* Does all sorts of transformations and filtering
*/
define('FORMAT_MOODLE', '0'); // Does all sorts of transformations and filtering
/**
* Plain HTML (with some tags stripped)
*/
define('FORMAT_HTML', '1'); // Plain HTML (with some tags stripped)
/**
* Plain text (even tags are printed in full)
*/
define('FORMAT_PLAIN', '2'); // Plain text (even tags are printed in full)
/**
* Wiki-formatted text
*/
define('FORMAT_WIKI', '3'); // Wiki-formatted text
/**
* Markdown-formatted text http://daringfireball.net/projects/markdown/
*/
define('FORMAT_MARKDOWN', '4'); // Markdown-formatted text http://daringfireball.net/projects/markdown/
/**
* Allowed tags - string of html tags that can be tested against for safe html tags
* @global string $ALLOWED_TAGS
*/
$ALLOWED_TAGS =
'<p><br><b><i><u><font><table><tbody><span><div><tr><td><th><ol><ul><dl><li><dt><dd><h1><h2><h3><h4><h5><h6><hr><img><a><strong><emphasis><em><sup><sub><address><cite><blockquote><pre><strike><embed><object><param><acronym><nolink><style><lang><tex><algebra><math><mi><mn><mo><mtext><mspace><ms><mrow><mfrac><msqrt><mroot><mstyle><merror><mpadded><mphantom><mfenced><msub><msup><msubsup><munder><mover><munderover><mmultiscripts><mtable><mtr><mtd><maligngroup><malignmark><maction><cn><ci><apply><reln><fn><interval><inverse><sep><condition><declare><lambda><compose><ident><quotient><exp><factorial><divide><max><min><minus><plus><power><rem><times><root><gcd><and><or><xor><not><implies><forall><exists><abs><conjugate><eq><neq><gt><lt><geq><leq><ln><log><int><diff><partialdiff><lowlimit><uplimit><bvar><degree><set><list><union><intersect><in><notin><subset><prsubset><notsubset><notprsubset><setdiff><sum><product><limit><tendsto><mean><sdev><variance><median><mode><moment><vector><matrix><matrixrow><determinant><transpose><selector><annotation><semantics><annotation-xml><tt><code>';
/**
* Allowed protocols - array of protocols that are safe to use in links and so on
* @global string $ALLOWED_PROTOCOLS
*/
$ALLOWED_PROTOCOLS = array('http', 'https', 'ftp', 'news', 'mailto', 'rtsp', 'teamspeak', 'gopher', 'color');
/// Functions
/**
* Add quotes to HTML characters
*
* Returns $var with HTML characters (like "<", ">", etc.) properly quoted.
* This function is very similar to {@link p()}
*
* @param string $var the string potentially containing HTML characters
* @return string
*/
function s($var) {
if (empty($var)) {
return '';
}
return htmlSpecialChars(stripslashes_safe($var));
}
/**
* Add quotes to HTML characters
*
* Prints $var with HTML characters (like "<", ">", etc.) properly quoted.
* This function is very similar to {@link s()}
*
* @param string $var the string potentially containing HTML characters
* @return string
*/
function p($var) {
if (empty($var)) {
echo '';
}
echo htmlSpecialChars(stripslashes_safe($var));
}
/**
* Ensure that a variable is set
*
* Return $var if it is defined, otherwise return $default,
* This function is very similar to {@link optional_variable()}
*
* @param mixed $var the variable which may be unset
* @param mixed $default the value to return if $var is unset
* @return mixed
*/
function nvl(&$var, $default='') {
return isset($var) ? $var : $default;
}
/**
* Remove query string from url
*
* Takes in a URL and returns it without the querystring portion
*
* @param string $url the url which may have a query string attached
* @return string
*/
function strip_querystring($url) {
if ($commapos = strpos($url, '?')) {
return substr($url, 0, $commapos);
} else {
return $url;
}
}
/**
* Returns the URL of the HTTP_REFERER, less the querystring portion
* @return string
*/
function get_referer() {
return strip_querystring(nvl($_SERVER['HTTP_REFERER']));
}
/**
* Returns the name of the current script, WITH the querystring portion.
* this function is necessary because PHP_SELF and REQUEST_URI and SCRIPT_NAME
* return different things depending on a lot of things like your OS, Web
* server, and the way PHP is compiled (ie. as a CGI, module, ISAPI, etc.)
* <b>NOTE:</b> This function returns false if the global variables needed are not set.
*
* @return string
*/
function me() {
if (!empty($_SERVER['REQUEST_URI'])) {
return $_SERVER['REQUEST_URI'];
} else if (!empty($_SERVER['PHP_SELF'])) {
if (!empty($_SERVER['QUERY_STRING'])) {
return $_SERVER['PHP_SELF'] .'?'. $_SERVER['QUERY_STRING'];
}
return $_SERVER['PHP_SELF'];
} else if (!empty($_SERVER['SCRIPT_NAME'])) {
if (!empty($_SERVER['QUERY_STRING'])) {
return $_SERVER['SCRIPT_NAME'] .'?'. $_SERVER['QUERY_STRING'];
}
return $_SERVER['SCRIPT_NAME'];
} else if (!empty($_SERVER['URL'])) { // May help IIS (not well tested)
if (!empty($_SERVER['QUERY_STRING'])) {
return $_SERVER['URL'] .'?'. $_SERVER['QUERY_STRING'];
}
return $_SERVER['URL'];
} else {
notify('Warning: Could not find any of these web server variables: $REQUEST_URI, $PHP_SELF, $SCRIPT_NAME or $URL');
return false;
}
}
/**
* Like {@link me()} but returns a full URL
* @see me()
* @return string
*/
function qualified_me() {
if (!empty($_SERVER['SERVER_NAME'])) {
$hostname = $_SERVER['SERVER_NAME'];
} else if (!empty($_ENV['SERVER_NAME'])) {
$hostname = $_ENV['SERVER_NAME'];
} else if (!empty($_SERVER['HTTP_HOST'])) {
$hostname = $_SERVER['HTTP_HOST'];
} else if (!empty($_ENV['HTTP_HOST'])) {
$hostname = $_ENV['HTTP_HOST'];
} else {
notify('Warning: could not find the name of this server!');
return false;
}
if (isset($_SERVER['HTTPS'])) {
$protocol = ($_SERVER['HTTPS'] == 'on') ? 'https://' : 'http://';
} else if (isset($_SERVER['SERVER_PORT'])) { # Apache2 does not export $_SERVER['HTTPS']
$protocol = ($_SERVER['SERVER_PORT'] == '443') ? 'https://' : 'http://';
} else {
$protocol = 'http://';
}
$url_prefix = $protocol.$hostname;
return $url_prefix . me();
}
/**
* Determine if a web referer is valid
*
* Returns true if the referer is the same as the goodreferer. If
* the referer to test is not specified, use {@link qualified_me()}.
* If the admin has not set secure forms ($CFG->secureforms) then
* this function returns true regardless of a match.
*
* @uses $CFG
* @param string $goodreferer the url to compare to referer
* @return boolean
*/
function match_referer($goodreferer = '') {
global $CFG;
if (empty($CFG->secureforms)) { // Don't bother checking referer
return true;
}
if ($goodreferer == 'nomatch') { // Don't bother checking referer
return true;
}
if (empty($goodreferer)) {
$goodreferer = qualified_me();
}
$referer = get_referer();
return (($referer == $goodreferer) or ($referer == $CFG->wwwroot .'/'));
}
/**
* Determine if there is data waiting to be processed from a form
*
* Used on most forms in Moodle to check for data
* Returns the data as an object, if it's found.
* This object can be used in foreach loops without
* casting because it's cast to (array) automatically
*
* Checks that submitted POST data exists, and also
* checks the referer against the given url (it uses
* the current page if none was specified.
*
* @uses $CFG
* @param string $url the url to compare to referer for secure forms
* @return boolean
*/
function data_submitted($url='') {
global $CFG;
if (empty($_POST)) {
return false;
} else {
if (match_referer($url)) {
return (object)$_POST;
} else {
if ($CFG->debug > 10) {
notice('The form did not come from this page! (referer = '. get_referer() .')');
}
return false;
}
}
}
/**
* Moodle replacement for php stripslashes() function
*
* The standard php stripslashes() removes ALL backslashes
* even from strings - so C:\temp becomes C:temp - this isn't good.
* This function should work as a fairly safe replacement
* to be called on quoted AND unquoted strings (to be sure)
*
* @param string the string to remove unsafe slashes from
* @return string
*/
function stripslashes_safe($string) {
$string = str_replace("\\'", "'", $string);
$string = str_replace('\\"', '"', $string);
//$string = str_replace('\\\\', '\\', $string); // why?
return $string;
}
/**
* Given some normal text this function will break up any
* long words to a given size by inserting the given character
*
* @param string $string the string to be modified
* @param int $maxsize maximum length of the string to be returned
* @param string $cutchar the string used to represent word breaks
* @return string
*/
function break_up_long_words($string, $maxsize=20, $cutchar=' ') {
if (in_array(current_language(), array('ja', 'zh_cn', 'zh_tw', 'zh_tw_utf8'))) { // Multibyte languages
return $string;
}
$output = '';
$length = strlen($string);
$wordlength = 0;
for ($i=0; $i<$length; $i++) {
$char = $string[$i];
if ($char == ' ' or $char == "\t" or $char == "\n" or $char == "\r") {
$wordlength = 0;
} else {
$wordlength++;
if ($wordlength > $maxsize) {
$output .= $cutchar;
$wordlength = 0;
}
}
$output .= $char;
}
return $output;
}
/**
* This does a search and replace, ignoring case
* This function is only used for versions of PHP older than version 5
* which do not have a native version of this function.
* Taken from the PHP manual, by bradhuizenga @ softhome.net
*
* @param string $find the string to search for
* @param string $replace the string to replace $find with
* @param string $string the string to search through
* return string
*/
if (!function_exists('str_ireplace')) { /// Only exists in PHP 5
function str_ireplace($find, $replace, $string) {
if (!is_array($find)) {
$find = array($find);
}
if(!is_array($replace)) {
if (!is_array($find)) {
$replace = array($replace);
} else {
// this will duplicate the string into an array the size of $find
$c = count($find);
$rString = $replace;
unset($replace);
for ($i = 0; $i < $c; $i++) {
$replace[$i] = $rString;
}
}
}
foreach ($find as $fKey => $fItem) {
$between = explode(strtolower($fItem),strtolower($string));
$pos = 0;
foreach($between as $bKey => $bItem) {
$between[$bKey] = substr($string,$pos,strlen($bItem));
$pos += strlen($bItem) + strlen($fItem);
}
$string = implode($replace[$fKey],$between);
}
return ($string);
}
}
/**
* Locate the position of a string in another string
*
* This function is only used for versions of PHP older than version 5
* which do not have a native version of this function.
* Taken from the PHP manual, by dmarsh @ spscc.ctc.edu
*
* @param string $haystack The string to be searched
* @param string $needle The string to search for
* @param int $offset The position in $haystack where the search should begin.
*/
if (!function_exists('stripos')) { /// Only exists in PHP 5
function stripos($haystack, $needle, $offset=0) {
return strpos(strtoupper($haystack), strtoupper($needle), $offset);
}
}
/**
* Load a template from file
*
* Returns a (big) string containing the contents of a template file with all
* the variables interpolated. all the variables must be in the $var[] array or
* object (whatever you decide to use).
*
* <b>WARNING: do not use this on big files!!</b>
*
* @param string $filename Location on the server's filesystem where template can be found.
* @param mixed $var Passed in by reference. An array or object which will be loaded with data from the template file.
*/
function read_template($filename, &$var) {
$temp = str_replace("\\", "\\\\", implode(file($filename), ''));
$temp = str_replace('"', '\"', $temp);
eval("\$template = \"$temp\";");
return $template;
}
/**
* Set a variable's value depending on whether or not it already has a value.
*
* If variable is set, set it to the set_value otherwise set it to the
* unset_value. used to handle checkboxes when you are expecting them from
* a form
*
* @param mixed $var Passed in by reference. The variable to check.
* @param mixed $set_value The value to set $var to if $var already has a value.
* @param mixed $unset_value The value to set $var to if $var does not already have a value.
*/
function checked(&$var, $set_value = 1, $unset_value = 0) {
if (empty($var)) {
$var = $unset_value;
} else {
$var = $set_value;
}
}
/**
* Prints the word "checked" if a variable is true, otherwise prints nothing,
* used for printing the word "checked" in a checkbox form element.
*
* @param boolean $var Variable to be checked for true value
* @param string $true_value Value to be printed if $var is true
* @param string $false_value Value to be printed if $var is false
*/
function frmchecked(&$var, $true_value = 'checked', $false_value = '') {
if ($var) {
echo $true_value;
} else {
echo $false_value;
}
}
/**
* This function will create a HTML link that will work on both
* Javascript and non-javascript browsers.
* Relies on the Javascript function openpopup in javascript.php
*
* $url must be relative to home page eg /mod/survey/stuff.php
* @param string $url Web link relative to home page
* @param string $name Name to be assigned to the popup window
* @param string $linkname Text to be displayed as web link
* @param int $height Height to assign to popup window
* @param int $width Height to assign to popup window
* @param string $title Text to be displayed as popup page title
* @param string $options List of additional options for popup window
* @todo Add code examples and list of some options that might be used.
* @param boolean $return Should the link to the popup window be returned as a string (true) or printed immediately (false)?
* @return string
* @uses $CFG
*/
function link_to_popup_window ($url, $name='popup', $linkname='click here',
$height=400, $width=500, $title='Popup window', $options='none', $return=false) {
global $CFG;
if ($options == 'none') {
$options = 'menubar=0,location=0,scrollbars,resizable,width='. $width .',height='. $height;
}
$fullscreen = 0;
if (!(strpos($url,$CFG->wwwroot) === false)) { // some log url entries contain _SERVER[HTTP_REFERRER] in which case wwwroot is already there.
$url = substr($url, strlen($CFG->wwwroot)+1);
}
$link = '<a target="'. $name .'" title="'. $title .'" href="'. $CFG->wwwroot . $url .'" '.
"onclick=\"return openpopup('$url', '$name', '$options', $fullscreen);\">$linkname</a>\n";
if ($return) {
return $link;
} else {
echo $link;
}
}
/**
* This function will print a button submit form element
* that will work on both Javascript and non-javascript browsers.
* Relies on the Javascript function openpopup in javascript.php
*
* $url must be relative to home page eg /mod/survey/stuff.php
* @param string $url Web link relative to home page
* @param string $name Name to be assigned to the popup window
* @param string $linkname Text to be displayed as web link
* @param int $height Height to assign to popup window
* @param int $width Height to assign to popup window
* @param string $title Text to be displayed as popup page title
* @param string $options List of additional options for popup window
* @todo Add code examples and list of some options that might be used.
* @return string
* @uses $CFG
*/
function button_to_popup_window ($url, $name='popup', $linkname='click here',
$height=400, $width=500, $title='Popup window', $options='none') {
global $CFG;
if ($options == 'none') {
$options = 'menubar=0,location=0,scrollbars,resizable,width='. $width .',height='. $height;
}
$fullscreen = 0;
echo '<input type="button" name="popupwindow" title="'. $title .'" value="'. $linkname .' ..." '.
"onclick=\"return openpopup('$url', '$name', '$options', $fullscreen);\" />\n";
}
/**
* Prints a simple button to close a window
*/
function close_window_button() {
echo '<center>' . "\n";
echo '<script type="text/javascript">' . "\n";
echo '<!--' . "\n";
echo "document.write('<form>');\n";
echo "document.write('<input type=\"button\" onclick=\"self.close();\" value=\"".get_string("closewindow")."\" />');\n";
echo "document.write('</form>');\n";
echo '-->' . "\n";
echo '</script>' . "\n";
echo '<noscript>' . "\n";
echo '<a href="'. $_SERVER['HTTP_REFERER'] .'"><---</a>' . "\n";
echo '</noscript>' . "\n";
echo '</center>' . "\n";
}
/**
* Given an array of value, creates a popup menu to be part of a form
* $options["value"]["label"]
*
* @param type description
* @todo Finish documenting this function
*/
function choose_from_menu ($options, $name, $selected='', $nothing='choose', $script='', $nothingvalue='0', $return=false) {
if ($nothing == 'choose') {
$nothing = get_string('choose') .'...';
}
if ($script) {
$javascript = 'onchange="'. $script .'"';
} else {
$javascript = '';
}
$output = '<select name="'. $name .'" '. $javascript .'>' . "\n";
if ($nothing) {
$output .= ' <option value="'. $nothingvalue .'"'. "\n";
if ($nothingvalue === $selected) {
$output .= ' selected="selected"';
}
$output .= '>'. $nothing .'</option>' . "\n";
}
if (!empty($options)) {
foreach ($options as $value => $label) {
$output .= ' <option value="'. $value .'"';
if ($value == $selected) {
$output .= ' selected="selected"';
}
if ($label === '') {
$output .= '>'. $value .'</option>' . "\n";
} else {
$output .= '>'. $label .'</option>' . "\n";
}
}
}
$output .= '</select>' . "\n";
if ($return) {
return $output;
} else {
echo $output;
}
}
/**
* Implements a complete little popup form
*
* @uses $CFG
* @param string $common The URL up to the point of the variable that changes
* @param array $options Alist of value-label pairs for the popup list
* @param string $formname Name must be unique on the page
* @param string $selected The option that is already selected
* @param string $nothing The label for the "no choice" option
* @param string $help The name of a help page if help is required
* @param string $helptext The name of the label for the help button
* @param boolean $return Indicates whether the function should return the text
* as a string or echo it directly to the page being rendered
* @param string $targetwindow The name of the target page to open the linked page in.
* @return string If $return is true then the entire form is returned as a string.
* @todo Finish documenting this function<br>
*/
function popup_form($common, $options, $formname, $selected='', $nothing='choose', $help='', $helptext='', $return=false, $targetwindow='self') {
global $CFG;
static $go, $choose; /// Locally cached, in case there's lots on a page
if (empty($options)) {
return '';
}
if (!isset($go)) {
$go = get_string('go');
}
if ($nothing == 'choose') {
if (!isset($choose)) {
$choose = get_string('choose');
}
$nothing = $choose.'...';
}
$startoutput = '<form action="'.$CFG->wwwroot.'/course/jumpto.php"'.
' method="get"'.
' target="'.$CFG->framename.'"'.
' name="'.$formname.'"'.
' style="display: inline;">';
$output = '<select name="jump" onchange="'.$targetwindow.'.location=document.'.$formname.
'.jump.options[document.'.$formname.'.jump.selectedIndex].value;">'."\n";
if ($nothing != '') {
$output .= " <option value=\"javascript:void(0)\">$nothing</option>\n";
}
$inoptgroup = false;
foreach ($options as $value => $label) {
if (substr($label,0,2) == '--') {
if ($inoptgroup) {
$output .= ' </optgroup>';
} else {
$inoptgroup = true;
}
$output .= ' <optgroup label="'. substr($label,2) .'">'; // Plain labels
continue;
} else {
$output .= ' <option value="'. $common . $value .'"';
if ($value == $selected) {
$output .= ' selected="selected"';
}
}
if ($label) {
$output .= '>'. $label .'</option>' . "\n";
} else {
$output .= '>'. $value .'</option>' . "\n";
}
}
if ($inoptgroup) {
$output .= ' </optgroup>';
}
$output .= '</select>';
$output .= '<noscript id="noscript'.$formname.'" style="display: inline;">';
$output .= '<input type="submit" value="'.$go.'" /></noscript>';
$output .= '<script type="text/javascript">'.
"\n<!--\n".
'document.getElementById("noscript'.$formname.'").style.display = "none";'.
"\n-->\n".'</script>';
$output .= '</form>' . "\n";
if ($help) {
$button = helpbutton($help, $helptext, 'moodle', true, false, '', true);
} else {
$button = '';
}
if ($return) {
return $startoutput.$button.$output;
} else {
echo $startoutput.$button.$output;
}
}
/**
* Prints some red text
*
* @param string $error The text to be displayed in red
*/
function formerr($error) {
if (!empty($error)) {
echo '<font color="#ff0000">'. $error .'</font>';
}
}
/**
* Validates an email to make sure it makes sense.
*
* @param string $address The email address to validate.
* @return boolean
*/
function validate_email($address) {
return (ereg('^[-!#$%&\'*+\\./0-9=?A-Z^_`a-z{|}~]+'.
'@'.
'[-!#$%&\'*+\\/0-9=?A-Z^_`a-z{|}~]+\.'.
'[-!#$%&\'*+\\./0-9=?A-Z^_`a-z{|}~]+$',
$address));
}
/**
* Check for bad characters ?
*
* @param string $string ?
* @param int $allowdots ?
* @todo Finish documenting this function - more detail needed in description as well as details on arguments
*/
function detect_munged_arguments($string, $allowdots=1) {
if (substr_count($string, '..') > $allowdots) { // Sometimes we allow dots in references
return true;
}
if (ereg('[\|\`]', $string)) { // check for other bad characters
return true;
}
if (empty($string) or $string == '/') {
return true;
}
return false;
}
/**
* Searches the current environment variables for some slash arguments
*
* @param string $file ?
* @todo Finish documenting this function
*/
function get_slash_arguments($file='file.php') {
if (!$string = me()) {
return false;
}
$pathinfo = explode($file, $string);
if (!empty($pathinfo[1])) {
return $pathinfo[1];
} else {
return false;
}
}
/**
* Extracts arguments from "/foo/bar/something"
* eg http://mysite.com/script.php/foo/bar/something
*
* @param string $string ?
* @param int $i ?
* @return array|string
* @todo Finish documenting this function
*/
function parse_slash_arguments($string, $i=0) {
if (detect_munged_arguments($string)) {
return false;
}
$args = explode('/', $string);
if ($i) { // return just the required argument
return $args[$i];
} else { // return the whole array
array_shift($args); // get rid of the empty first one
return $args;
}
}
/**
* Just returns an array of text formats suitable for a popup menu
*
* @uses FORMAT_MOODLE
* @uses FORMAT_HTML
* @uses FORMAT_PLAIN
* @uses FORMAT_WIKI
* @uses FORMAT_MARKDOWN
* @return array
*/
function format_text_menu() {
return array (FORMAT_MOODLE => get_string('formattext'),
FORMAT_HTML => get_string('formathtml'),
FORMAT_PLAIN => get_string('formatplain'),
FORMAT_WIKI => get_string('formatwiki'),
FORMAT_MARKDOWN => get_string('formatmarkdown'));
}
/**
* Given text in a variety of format codings, this function returns
* the text as safe HTML.
*
* @uses $CFG
* @uses FORMAT_MOODLE
* @uses FORMAT_HTML
* @uses FORMAT_PLAIN
* @uses FORMAT_WIKI
* @uses FORMAT_MARKDOWN
* @param string $text The text to be formatted. This is raw text originally from user input.
* @param int $format Identifier of the text format to be used
* (FORMAT_MOODLE, FORMAT_HTML, FORMAT_PLAIN, FORMAT_WIKI, FORMAT_MARKDOWN)
* @param array $options ?
* @param int $courseid ?
* @return string
* @todo Finish documenting this function
*/
function format_text($text, $format=FORMAT_MOODLE, $options=NULL, $courseid=NULL ) {
global $CFG, $course;
if (!empty($CFG->cachetext)) {
$time = time() - $CFG->cachetext;
$md5key = md5($text);
if ($cacheitem = get_record_select('cache_text', "md5key = '$md5key' AND timemodified > '$time'")) {
return $cacheitem->formattedtext;
}
}
if (empty($courseid)) {
if (!empty($course->id)) { // An ugly hack for better compatibility
$courseid = $course->id;
}
}
$CFG->currenttextiscacheable = true; // Default status - can be changed by any filter
switch ($format) {
case FORMAT_HTML:
replace_smilies($text);
if (!isset($options->noclean)) {
$text = clean_text($text, $format);
}
$text = filter_text($text, $courseid);
break;
case FORMAT_PLAIN:
$text = htmlentities($text);
$text = rebuildnolinktag($text);
$text = str_replace(' ', '&nbsp; ', $text);
$text = nl2br($text);
break;
case FORMAT_WIKI:
$text = wiki_to_html($text,$courseid);
$text = rebuildnolinktag($text);
if (!isset($options->noclean)) {
$text = clean_text($text, $format);
}
$text = filter_text($text, $courseid);
break;
case FORMAT_MARKDOWN:
$text = markdown_to_html($text);
if (!isset($options->noclean)) {
$text = clean_text($text, $format);
}
replace_smilies($text);
$text = filter_text($text, $courseid);
break;
default: // FORMAT_MOODLE or anything else
if (!isset($options->smiley)) {
$options->smiley=true;
}
if (!isset($options->para)) {
$options->para=true;
}
if (!isset($options->newlines)) {
$options->newlines=true;
}
$text = text_to_html($text, $options->smiley, $options->para, $options->newlines);
if (!isset($options->noclean)) {
$text = clean_text($text, $format);
}
$text = filter_text($text, $courseid);
break;
}
if (!empty($CFG->cachetext) and $CFG->currenttextiscacheable) {
$newrecord->md5key = $md5key;
$newrecord->formattedtext = addslashes($text);
$newrecord->timemodified = time();
@insert_record('cache_text', $newrecord);
}
return $text;
}
/**
* Given text in a variety of format codings, this function returns
* the text as plain text suitable for plain email.
*
* @uses FORMAT_MOODLE
* @uses FORMAT_HTML
* @uses FORMAT_PLAIN
* @uses FORMAT_WIKI
* @uses FORMAT_MARKDOWN
* @param string $text The text to be formatted. This is raw text originally from user input.
* @param int $format Identifier of the text format to be used
* (FORMAT_MOODLE, FORMAT_HTML, FORMAT_PLAIN, FORMAT_WIKI, FORMAT_MARKDOWN)
* @return string
*/
function format_text_email($text, $format) {
switch ($format) {
case FORMAT_PLAIN:
return $text;
break;
case FORMAT_WIKI:
$text = wiki_to_html($text);
/// This expression turns links into something nice in a text format. (Russell Jungwirth)
/// From: http://php.net/manual/en/function.eregi-replace.php and simplified
$text = eregi_replace('(<a [^<]*href=["|\']?([^ "\']*)["|\']?[^>]*>([^<]*)</a>)','\\3 [ \\2 ]', $text);
return strtr(strip_tags($text), array_flip(get_html_translation_table(HTML_ENTITIES)));
break;
case FORMAT_HTML:
return html_to_text($text);
break;
case FORMAT_MOODLE:
case FORMAT_MARKDOWN:
default:
$text = eregi_replace('(<a [^<]*href=["|\']?([^ "\']*)["|\']?[^>]*>([^<]*)</a>)','\\3 [ \\2 ]', $text);
return strtr(strip_tags($text), array_flip(get_html_translation_table(HTML_ENTITIES)));
break;
}
}
/**
* Given some text in HTML format, this function will pass it
* through any filters that have been defined in $CFG->textfilterx
* The variable defines a filepath to a file containing the
* filter function. The file must contain a variable called
* $textfilter_function which contains the name of the function
* with $courseid and $text parameters
*
* @param string $text The text to be passed through format filters
* @param int $courseid ?
* @return string
* @todo Finish documenting this function
*/
function filter_text($text, $courseid=NULL) {
global $CFG;
if (!empty($CFG->textfilters)) {
$textfilters = explode(',', $CFG->textfilters);
foreach ($textfilters as $textfilter) {
if (is_readable($CFG->dirroot .'/'. $textfilter .'/filter.php')) {
include_once($CFG->dirroot .'/'. $textfilter .'/filter.php');
$functionname = basename($textfilter).'_filter';
if (function_exists($functionname)) {
$text = $functionname($courseid, $text);
}
}
}
}
return $text;
}
/**
* Given raw text (eg typed in by a user), this function cleans it up
* and removes any nasty tags that could mess up Moodle pages.
*
* @uses FORMAT_MOODLE
* @uses FORMAT_PLAIN
* @uses ALLOWED_TAGS
* @param string $text The text to be cleaned
* @param int $format Identifier of the text format to be used
* (FORMAT_MOODLE, FORMAT_HTML, FORMAT_PLAIN, FORMAT_WIKI, FORMAT_MARKDOWN)
* @return string The cleaned up text
*/
function clean_text($text, $format=FORMAT_MOODLE) {
global $ALLOWED_TAGS;
switch ($format) {
case FORMAT_PLAIN:
return $text;
default:
/// Remove tags that are not allowed
$text = strip_tags($text, $ALLOWED_TAGS);
/// Remove script events
$text = eregi_replace("([^a-z])language([[:space:]]*)=", "\\1Xlanguage=", $text);
$text = eregi_replace("([^a-z])on([a-z]+)([[:space:]]*)=", "\\1Xon\\2=", $text);
/// Clean up embedded scripts and , using kses
$text = cleanAttributes($text);
return $text;
}
}
/**
* This function takes a string and examines it for HTML tags.
* If tags are detected it passes the string to a helper function {@link cleanAttributes2()}
* which checks for attributes and filters them for malicious content
* 17/08/2004 :: Eamon DOT Costello AT dcu DOT ie
*
* @param string $str The string to be examined for html tags
* @return string
*/
function cleanAttributes($str){
$result = preg_replace(
'%(<[^>]*(>|$)|>)%me', #search for html tags
"cleanAttributes2('\\1')",
$str
);
return $result;
}
/**
* This function takes a string with an html tag and strips out any unallowed
* protocols e.g. javascript:
* It calls ancillary functions in kses which are prefixed by kses
* 17/08/2004 :: Eamon DOT Costello AT dcu DOT ie
*
* @param string $htmlTag An html tag to be examined
* @return string
*/
function cleanAttributes2($htmlTag){
global $CFG, $ALLOWED_PROTOCOLS;
require_once($CFG->libdir .'/kses.php');
$htmlTag = kses_stripslashes($htmlTag);
if (substr($htmlTag, 0, 1) != '<') {
return '&gt;'; //a single character ">" detected
}
if (!preg_match('%^<\s*(/\s*)?([a-zA-Z0-9]+)([^>]*)>?$%', $htmlTag, $matches)) {
return ''; // It's seriously malformed
}
$slash = trim($matches[1]); //trailing xhtml slash
$elem = $matches[2]; //the element name
$attrlist = $matches[3]; // the list of attributes as a string
$attrArray = kses_hair($attrlist, $ALLOWED_PROTOCOLS);
$attStr = '';
foreach ($attrArray as $arreach) {
$attStr .= ' '.strtolower($arreach['name']).'="'.$arreach['value'].'" ';
}
$xhtml_slash = '';
if (preg_match('%/\s*$%', $attrlist)) {
$xhtml_slash = ' /';
}
return '<'. $slash . $elem . $attStr . $xhtml_slash .'>';
}
/**
* Replaces all known smileys in the text with image equivalents
*
* @uses $CFG
* @param string $text Passed by reference. The string to search for smily strings.
* @return string
*/
function replace_smilies(&$text) {
///
global $CFG;
/// this builds the mapping array only once
static $runonce = false;
static $e = array();
static $img = array();
static $emoticons = array(
':-)' => 'smiley',
':)' => 'smiley',
':-D' => 'biggrin',
';-)' => 'wink',
':-/' => 'mixed',
'V-.' => 'thoughtful',
':-P' => 'tongueout',
'B-)' => 'cool',
'^-)' => 'approve',
'8-)' => 'wideeyes',
':o)' => 'clown',
':-(' => 'sad',
':(' => 'sad',
'8-.' => 'shy',
':-I' => 'blush',
':-X' => 'kiss',
'8-o' => 'surprise',
'P-|' => 'blackeye',
'8-[' => 'angry',
'xx-P' => 'dead',
'|-.' => 'sleepy',
'}-]' => 'evil',
);
if ($runonce == false) { /// After the first time this is not run again
foreach ($emoticons as $emoticon => $image){
$alttext = get_string($image, 'pix');
$e[] = $emoticon;
$img[] = '<img alt="'. $alttext .'" width="15" height="15" src="'. $CFG->pixpath .'/s/'. $image .'.gif" />';
}
$runonce = true;
}
// Exclude from transformations all the code inside <script> tags
// Needed to solve Bug 1185. Thanks to jouse 2001 detecting it. :-)
// Based on code from glossary fiter by Williams Castillo.
// - Eloy
// Detect all the <script> zones to take out
$excludes = array();
preg_match_all('/<script language(.+?)<\/script>/is',$text,$list_of_excludes);
// Take out all the <script> zones from text
foreach (array_unique($list_of_excludes[0]) as $key=>$value) {
$excludes['<+'.$key.'+>'] = $value;
}
if ($excludes) {
$text = str_replace($excludes,array_keys($excludes),$text);
}
/// this is the meat of the code - this is run every time
$text = str_replace($e, $img, $text);
// Recover all the <script> zones to text
if ($excludes) {
$text = str_replace(array_keys($excludes),$excludes,$text);
}
}
/**
* Given plain text, makes it into HTML as nicely as possible.
* May contain HTML tags already
*
* @uses $CFG
* @param string $text The string to convert.
* @param boolean $smiley Convert any smiley characters to smiley images?
* @param boolean $para If true then the returned string will be wrapped in paragraph tags
* @param boolean $newlines If true then lines newline breaks will be converted to HTML newline breaks.
* @return string
*/
function text_to_html($text, $smiley=true, $para=true, $newlines=true) {
///
global $CFG;
/// Remove any whitespace that may be between HTML tags
$text = eregi_replace(">([[:space:]]+)<", "><", $text);
/// Remove any returns that precede or follow HTML tags
$text = eregi_replace("([\n\r])<", " <", $text);
$text = eregi_replace(">([\n\r])", "> ", $text);
convert_urls_into_links($text);
/// Make returns into HTML newlines.
if ($newlines) {
$text = nl2br($text);
}
/// Turn smileys into images.
if ($smiley) {
replace_smilies($text);
}
/// Wrap the whole thing in a paragraph tag if required
if ($para) {
return '<p>'.$text.'</p>';
} else {
return $text;
}
}
/**
* Given Wiki formatted text, make it into XHTML using external function
*
* @uses $CFG
* @param string $text The text to be converted.
* @param int $courseid The id, as found in 'course' table, of the course this text is being placed in.
* @return string
*/
function wiki_to_html($text, $courseid) {
global $CFG;
require_once($CFG->libdir .'/wiki.php');
$wiki = new Wiki;
return $wiki->format($text, $courseid);
}
/**
* Given Markdown formatted text, make it into XHTML using external function
*
* @uses $CFG
* @param string $text The markdown formatted text to be converted.
* @return string Converted text
*/
function markdown_to_html($text) {
global $CFG;
require_once($CFG->libdir .'/markdown.php');
return Markdown($text);
}
/**
* Given HTML text, make it into plain text using external function
*
* @uses $CFG
* @param string $html The text to be converted.
* @return string
*/
function html_to_text($html) {
global $CFG;
require_once($CFG->libdir .'/html2text.php');
return html2text($html);
}
/**
* Given some text this function converts any URLs it finds into HTML links
*
* @param string $text Passed in by reference. The string to be searched for urls.
*/
function convert_urls_into_links(&$text) {
/// Make lone URLs into links. eg http://moodle.com/
$text = eregi_replace("([[:space:]]|^|\(|\[)([[:alnum:]]+)://([^[:space:]]*)([[:alnum:]#?/&=])",
"\\1<a href=\"\\2://\\3\\4\" target=\"newpage\">\\2://\\3\\4</a>", $text);
/// eg www.moodle.com
$text = eregi_replace("([[:space:]]|^|\(|\[)www\.([^[:space:]]*)([[:alnum:]#?/&=])",
"\\1<a href=\"http://www.\\2\\3\" target=\"newpage\">www.\\2\\3</a>", $text);
}
/**
* This function will highlight search words in a given string
* It cares about HTML and will not ruin links. It's best to use
* this function after performing any conversions to HTML.
* Function found here: http://forums.devshed.com/t67822/scdaa2d1c3d4bacb4671d075ad41f0854.html
*
* @param string $needle The string to search for
* @param string $haystack The string to search for $needle in
* @param int $case ?
* @return string
* @todo Finish documenting this function
*/
function highlight($needle, $haystack, $case=0,
$left_string='<span class="highlight">', $right_string='</span>') {
if (empty($needle)) {
return $haystack;
}
$list_of_words = eregi_replace("[^-a-zA-Z0-9&']", " ", $needle);
$list_array = explode(' ', $list_of_words);
for ($i=0; $i<sizeof($list_array); $i++) {
if (strlen($list_array[$i]) == 1) {
$list_array[$i] = '';
}
}
$list_of_words = implode(' ', $list_array);
$list_of_words_cp = $list_of_words;
$final = array();
preg_match_all('/<(.+?)>/is',$haystack,$list_of_words);
foreach (array_unique($list_of_words[0]) as $key=>$value) {
$final['<|'.$key.'|>'] = $value;
}
$haystack = str_replace($final,array_keys($final),$haystack);
$list_of_words_cp = eregi_replace(' +', '|', $list_of_words_cp);
if ($list_of_words_cp{0}=='|') {
$list_of_words_cp{0} = '';
}
if ($list_of_words_cp{strlen($list_of_words_cp)-1}=='|') {
$list_of_words_cp{strlen($list_of_words_cp)-1}='';
}
$list_of_words_cp = '('. trim($list_of_words_cp) .')';
if (!$case){
$haystack = eregi_replace($list_of_words_cp, $left_string ."\\1". $right_string, $haystack);
} else {
$haystack = ereg_replace($list_of_words_cp, $left_string ."\\1". $right_string, $haystack);
}
$haystack = str_replace(array_keys($final),$final,$haystack);
return $haystack;
}
/**
* This function will highlight instances of $needle in $haystack
* It's faster that the above function and doesn't care about
* HTML or anything.
*
* @param string $needle The string to search for
* @param string $haystack The string to search for $needle in
* @return string
*/
function highlightfast($needle, $haystack) {
$parts = explode(strtolower($needle), strtolower($haystack));
$pos = 0;
foreach ($parts as $key => $part) {
$parts[$key] = substr($haystack, $pos, strlen($part));
$pos += strlen($part);
$parts[$key] .= '<span class="highlight">'.substr($haystack, $pos, strlen($needle)).'</span>';
$pos += strlen($needle);
}
return (join('', $parts));
}
/// STANDARD WEB PAGE PARTS ///////////////////////////////////////////////////
/**
* Print a standard header
*
* @uses $USER
* @uses $CFG
* @uses $THEME
* @uses $SESSION
* @param string $title Appears at the top of the window
* @param string $heading Appears at the top of the page
* @param string $navigation Premade navigation string (for use as breadcrumbs links)
* @param string $focus Indicates form element to get cursor focus on load eg inputform.password
* @param string $meta Meta tags to be added to the header
* @param boolean $cache Should this page be cacheable?
* @param string $button HTML code for a button (usually for module editing)
* @param string $menu HTML code for a popup menu
* @param boolean $usexml use XML for this page
* @param string $bodytags This text will be included verbatim in the <body> tag (useful for onload() etc)
*/
function print_header ($title='', $heading='', $navigation='', $focus='', $meta='',
$cache=true, $button='&nbsp;', $menu='', $usexml=false, $bodytags='') {
global $USER, $CFG, $THEME, $SESSION;
global $course; // This is a bit of an ugly hack to be gotten rid of later
if (!empty($course->lang)) {
$CFG->courselang = $course->lang;
}
if (file_exists($CFG->dirroot .'/theme/'. $CFG->theme .'/styles.php')) {
$styles = $CFG->stylesheet;
} else {
$styles = $CFG->wwwroot .'/theme/standard/styles.php';
}
if ($navigation == 'home') {
$home = true;
$navigation = '';
} else {
$home = false;
}
if ($button == '') {
$button = '&nbsp;';
}
if (!$menu and $navigation) {
if (empty($CFG->loginhttps)) {
$wwwroot = $CFG->wwwroot;
} else {
$wwwroot = str_replace('http','https',$CFG->wwwroot);
}
if (isset($USER->id)) {
$menu = '<font size="2"><a target="'. $CFG->framename .'" href="'. $wwwroot .'/login/logout.php">'. get_string('logout') .'</a></font>';
} else {
$menu = '<font size="2"><a target="'. $CFG->framename .'" href="'. $wwwroot .'/login/index.php">'. get_string('login') .'</a></font>';
}
}
if (isset($SESSION->justloggedin)) {
unset($SESSION->justloggedin);
if (!empty($CFG->displayloginfailures)) {
if (!empty($USER->username) and !isguest()) {
if ($count = count_login_failures($CFG->displayloginfailures, $USER->username, $USER->lastlogin)) {
$menu .= '&nbsp;<font size="1">';
if (empty($count->accounts)) {
$menu .= get_string('failedloginattempts', '', $count);
} else {
$menu .= get_string('failedloginattemptsall', '', $count);
}
if (isadmin()) {
$menu .= ' (<a href="'.$CFG->wwwroot.'/course/log.php'.
'?chooselog=1&amp;id=1&amp;modid=site_errors">'.get_string('logs').'</a>)';
}
$menu .= '</font>';
}
}
}
}
// Add a stylesheet for the HTML editor
$meta = "<style type=\"text/css\">@import url($CFG->wwwroot/lib/editor/htmlarea.css);</style>\n$meta\n";
if (!empty($CFG->unicode)) {
$encoding = 'utf-8';
} else if (!empty($CFG->courselang)) {
$encoding = get_string('thischarset');
moodle_setlocale();
} else {
if (!empty($SESSION->encoding)) {
$encoding = $SESSION->encoding;
} else {
$SESSION->encoding = $encoding = get_string('thischarset');
}
}
$meta = '<meta http-equiv="content-type" content="text/html; charset='. $encoding .'" />'. "\n". $meta ."\n";
if (!$usexml) {
@header('Content-type: text/html; charset='.$encoding);
}
if ( get_string('thisdirection') == 'rtl' ) {
$direction = ' dir="rtl"';
} else {
$direction = ' dir="ltr"';
}
if (!$cache) { // Do everything we can to prevent clients and proxies caching
@header('Expires: Mon, 20 Aug 1969 09:23:00 GMT');
@header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
@header('Cache-Control: no-store, no-cache, must-revalidate');
@header('Cache-Control: post-check=0, pre-check=0', false);
@header('Pragma: no-cache');
$meta .= "\n".'<meta http-equiv="pragma" content="no-cache" />';
$meta .= "\n".'<meta http-equiv="expires" content="0" />';
}
if ($usexml) { // Added by Gustav Delius / Mad Alex for MathML output
// Modified by Julian Sedding
$currentlanguage = current_language();
$mathplayer = preg_match("/MathPlayer/i", $_SERVER['HTTP_USER_AGENT']);
if(!$mathplayer) {
header('Content-Type: application/xhtml+xml');
}
echo '<?xml version="1.0" ?>'."\n";
if (!empty($CFG->xml_stylesheets)) {
$stylesheets = explode(';', $CFG->xml_stylesheets);
foreach ($stylesheets as $stylesheet) {
echo '<?xml-stylesheet type="text/xsl" href="'. $CFG->wwwroot .'/'. $stylesheet .'" ?>' . "\n";
}
}
echo '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1';
if (!empty($CFG->xml_doctype_extra)) {
echo ' plus '. $CFG->xml_doctype_extra;
}
echo '//' . strtoupper($currentlanguage) . '" "'. $CFG->xml_dtd .'">'."\n";
$direction = " xmlns=\"http://www.w3.org/1999/xhtml\"
xmlns:math=\"http://www.w3.org/1998/Math/MathML\"
xml:lang=\"en\"
xmlns:xlink=\"http://www.w3.org/1999/xlink\"
$direction";
if($mathplayer) {
$meta .= '<object id="mathplayer" classid="clsid:32F66A20-7614-11D4-BD11-00104BD3F987">' . "\n";
$meta .= '<!--comment required to prevent this becoming an empty tag-->'."\n";
$meta .= '</object>'."\n";
$meta .= '<?import namespace="math" implementation="#mathplayer" ?>' . "\n";
}
}
$title = str_replace('"', '&quot;', $title);
$title = strip_tags($title);
include ($CFG->dirroot .'/theme/'. $CFG->theme .'/header.html');
}
/**
* This version of print_header is simpler because the course name does not have to be
* provided explicitly in the strings. It can be used on the site page as in courses
* Eventually all print_header could be replaced by print_header_simple
*
* @param string $title Appears at the top of the window
* @param string $heading Appears at the top of the page
* @param string $navigation Premade navigation string (for use as breadcrumbs links)
* @param string $focus Indicates form element to get cursor focus on load eg inputform.password
* @param string $meta Meta tags to be added to the header
* @param boolean $cache Should this page be cacheable?
* @param string $button HTML code for a button (usually for module editing)
* @param string $menu HTML code for a popup menu
* @param boolean $usexml use XML for this page
* @param string $bodytags This text will be included verbatim in the <body> tag (useful for onload() etc)
*/
function print_header_simple($title='', $heading='', $navigation='', $focus='', $meta='',
$cache=true, $button='&nbsp;', $menu='', $usexml=false, $bodytags='') {
global $course; // The same hack is used in print_header
$shortname ='';
if ($course->category) {
$shortname = '<a href="../../course/view.php?id='. $course->id .'">'. $course->shortname .'</a> ->';
}
print_header($course->shortname .': '. $title, $course->fullname .' '. $heading, $shortname .' '. $navigation, $focus, $meta,
$cache, $button, $menu, $usexml, $bodytags);
}
/**
* Can provide a course object to make the footer contain a link to
* to the course home page, otherwise the link will go to the site home
*
* @uses $CFG
* @uses $USER
* @uses $THEME
* @param course $course {@link $COURSE} object containing course information
* @param ? $usercourse ?
* @todo Finish documenting this function
*/
function print_footer ($course=NULL, $usercourse=NULL) {
global $USER, $CFG, $THEME;
/// Course links
if ($course) {
if ($course == 'home') { // special case for site home page - please do not remove
$homelink = '<a title="moodle '. $CFG->release .' ('. $CFG->version .')" href="http://moodle.org/" target="_blank">';
$homelink .= '<br /><img width="100" height="30" src="pix/moodlelogo.gif" border="0" alt="moodlelogo" /></a>';
$course = get_site();
$homepage = true;
} else {
$homelink = "<a target=\"{$CFG->framename}\" href=\"$CFG->wwwroot/course/view.php?id=$course->id\">$course->shortname</a>";
}
} else {
$homelink = "<a target=\"{$CFG->framename}\" href=\"$CFG->wwwroot/\">".get_string('home').'</a>';
$course = get_site();
}
if (!$usercourse) {
$usercourse = $course;
}
/// User links
$loggedinas = user_login_string($usercourse, $USER);
include ($CFG->dirroot .'/theme/'. $CFG->theme .'/footer.html');
}
/**
* This function is called by stylesheets to set up the header
* approriately as well as the current path
*
* @uses $CFG
* @param int $lastmodified ?
* @param int $lifetime ?
* @param string $thename ?
* @todo Finish documenting this function
*/
function style_sheet_setup($lastmodified=0, $lifetime=300, $themename='') {
global $CFG;
header('Last-Modified: ' . gmdate("D, d M Y H:i:s", $lastmodified) . ' GMT');
header('Expires: ' . gmdate("D, d M Y H:i:s", time() + $lifetime) . ' GMT');
header('Cache-control: max_age = '. $lifetime);
header('Pragma: ');
header('Content-type: text/css'); // Correct MIME type
if (!empty($themename)) {
$CFG->theme = $themename;
}
return $CFG->wwwroot .'/theme/'. $CFG->theme;
}
/**
* Returns text to be displayed to the user which reflects their login status
*
* @uses $CFG
* @uses $USER
* @param course $course {@link $COURSE} object containing course information
* @param user $user {@link $USER} object containing user information
* @return string
* @todo Finish documenting this function
*/
function user_login_string($course, $user=NULL) {
global $USER, $CFG;
if (empty($user)) {
$user = $USER;
}
if (isset($user->realuser)) {
if ($realuser = get_record('user', 'id', $user->realuser)) {
$fullname = fullname($realuser, true);
$realuserinfo = " [<a target=\"{$CFG->framename}\"
href=\"$CFG->wwwroot/course/loginas.php?id=$course->id&amp;return=$realuser->id\">$fullname</a>] ";
}
} else {
$realuserinfo = '';
}
if (empty($CFG->loginhttps)) {
$wwwroot = $CFG->wwwroot;
} else {
$wwwroot = str_replace('http','https',$CFG->wwwroot);
}
if (isset($user->id) and $user->id) {
$fullname = fullname($user, true);
$username = "<a target=\"{$CFG->framename}\" href=\"$CFG->wwwroot/user/view.php?id=$user->id&amp;course=$course->id\">$fullname</a>";
if (isguest($user->id)) {
$loggedinas = $realuserinfo.get_string('loggedinas', 'moodle', $username).
" (<a target=\"{$CFG->framename}\" href=\"$wwwroot/login/index.php\">".get_string('login').'</a>)';
} else {
$loggedinas = $realuserinfo.get_string('loggedinas', 'moodle', $username).
" (<a target=\"{$CFG->framename}\" href=\"$CFG->wwwroot/login/logout.php\">".get_string('logout').'</a>)';
}
} else {
$loggedinas = get_string('loggedinnot', 'moodle').
" (<a target=\"{$CFG->framename}\" href=\"$wwwroot/login/index.php\">".get_string('login').'</a>)';
}
return $loggedinas;
}
/**
* Prints breadcrumbs links
*
* @uses $CFG
* @param string $navigation The breadcrumbs string to be printed
*/
function print_navigation ($navigation) {
global $CFG;
if ($navigation) {
if (! $site = get_site()) {
$site->shortname = get_string('home');;
}
$navigation = str_replace('->', '&raquo;', $navigation);
echo '<a target="'. $CFG->framename .'" href="'. $CFG->wwwroot .'/">'. $site->shortname .'</a> &raquo; '. $navigation;
}
}
/**
* Prints a string in a specified size
*
* @param string $text The text to be displayed
* @param int $size The size to set the font for text display.
*/
function print_headline($text, $size=2) {
echo '<strong><font size="'. $size .'">'. $text .'</font></strong><br />'."\n";
}
/**
* Prints text in a format for use in headings.
*
* @param string $text The text to be displayed
* @param string $align The alignment of the printed paragraph of text
* @param int $size The size to set the font for text display.
*/
function print_heading($text, $align='center', $size=3) {
echo '<p align="'. $align .'"><font size="'. $size .'"><strong>'. stripslashes_safe($text) .'</strong></font></p>';
}
/**
* Centered heading with attached help button (same title text)
* and optional icon attached
*
* @param string $text The text to be displayed
* @param string $helppage The help page to link to
* @param string $module The module whose help should be linked to
* @param string $icon Image to display if needed
*/
function print_heading_with_help($text, $helppage, $module='moodle', $icon='') {
echo '<p align="center"><font size="3">'. $icon .'<strong>'. stripslashes_safe($text);
helpbutton($helppage, $text, $module);
echo '</strong></font></p>';
}
/**
* Print a link to continue on to another page.
*
* @uses $CFG
* @param string $link The url to create a link to.
*/
function print_continue($link) {
global $CFG;
if (!$link) {
$link = $_SERVER['HTTP_REFERER'];
}
print_heading('<a target="'. $CFG->framename .'" href="'. $link .'">'. get_string('continue').'</a>');
}
/**
* Print a message in a standard themed box.
*
* @param string $message ?
* @param string $align ?
* @param string $width ?
* @param string $color ?
* @param int $padding ?
* @param string $class ?
* @todo Finish documenting this function
*/
function print_simple_box($message, $align='', $width='', $color='#FFFFFF', $padding=5, $class='generalbox') {
print_simple_box_start($align, $width, $color, $padding, $class);
echo stripslashes_safe($message);
print_simple_box_end();
}
/**
* Print the top portion of a standard themed box.
*
* @param string $align ?
* @param string $width ?
* @param string $color ?
* @param int $padding ?
* @param string $class ?
* @todo Finish documenting this function
*/
function print_simple_box_start($align='', $width='', $color='#FFFFFF', $padding=5, $class='generalbox') {
global $THEME;
if ($align) {
$align = 'align="'. $align .'"';
}
if ($width) {
$width = 'width="'. $width .'"';
}
echo "<table $align $width class=\"$class\" border=\"0\" cellpadding=\"$padding\" cellspacing=\"0\"><tr><td bgcolor=\"$color\" class=\"$class"."content\">";
}
/**
* Print the end portion of a standard themed box.
*/
function print_simple_box_end() {
echo '</td></tr></table>';
}
/**
* Print a self contained form with a single submit button.
*
* @param string $link ?
* @param array $options ?
* @param string $label ?
* @param string $method ?
* @todo Finish documenting this function
*/
function print_single_button($link, $options, $label='OK', $method='get') {
echo '<form action="'. $link .'" method="'. $method .'">';
if ($options) {
foreach ($options as $name => $value) {
echo '<input type="hidden" name="'. $name .'" value="'. $value .'" />';
}
}
echo '<input type="submit" value="'. $label .'" /></form>';
}
/**
* Print a spacer image with the option of including a line break.
*
* @param int $height ?
* @param int $width ?
* @param boolean $br ?
* @todo Finish documenting this function
*/
function print_spacer($height=1, $width=1, $br=true) {
global $CFG;
echo '<img height="'. $height .'" width="'. $width .'" src="'. $CFG->wwwroot .'/pix/spacer.gif" alt="" />';
if ($br) {
echo '<br />'."\n";
}
}
/**
* Given the path to a picture file in a course, or a URL,
* this function includes the picture in the page.
*
* @param string $path ?
* @param int $courseid ?
* @param int $height ?
* @param int $width ?
* @param string $link ?
* @todo Finish documenting this function
*/
function print_file_picture($path, $courseid=0, $height='', $width='', $link='') {
global $CFG;
if ($height) {
$height = 'height="'. $height .'"';
}
if ($width) {
$width = 'width="'. $width .'"';
}
if ($link) {
echo '<a href="'. $link .'">';
}
if (substr(strtolower($path), 0, 7) == 'http://') {
echo '<img border="0" '.$height . $width .' src="'. $path .'" />';
} else if ($courseid) {
echo '<img border="0" '. $height . $width .' src="';
if ($CFG->slasharguments) { // Use this method if possible for better caching
echo $CFG->wwwroot .'/file.php/'. $courseid .'/'. $path;
} else {
echo $CFG->wwwroot .'/file.php?file=/'. $courseid .'/'. $path;
}
echo '" />';
} else {
echo 'Error: must pass URL or course';
}
if ($link) {
echo '</a>';
}
}
/**
* Print the specified user's avatar.
*
* @param int $userid ?
* @param int $courseid ?
* @param boolean $picture Print the user picture?
* @param boolean $large Should the picture be printed at 100 pixels or 35?
* @param boolean $returnstring If false print picture to current page, otherwise return the output as string
* @param boolean $link Enclose printed image in a link to view specified course?
* return string
* @todo Finish documenting this function
*/
function print_user_picture($userid, $courseid, $picture, $large=false, $returnstring=false, $link=true) {
global $CFG;
if ($link) {
$output = '<a href="'. $CFG->wwwroot .'/user/view.php?id='. $userid .'&amp;course='. $courseid .'">';
} else {
$output = '';
}
if ($large) {
$file = 'f1';
$size = 100;
} else {
$file = 'f2';
$size = 35;
}
if ($picture) { // Print custom user picture
if ($CFG->slasharguments) { // Use this method if possible for better caching
$output .= '<img align="middle" src="'. $CFG->wwwroot .'/user/pix.php/'. $userid .'/'. $file .'.jpg"'.
' border="0" width="'. $size .'" height="'. $size .'" alt="" />';
} else {
$output .= '<img align="middle" src="'. $CFG->wwwroot .'/user/pix.php?file=/'. $userid .'/'. $file .'.jpg"'.
' border="0" width="'. $size .'" height="'. $size .'" alt="" />';
}
} else { // Print default user pictures (use theme version if available)
$output .= "<img align=\"middle\" src=\"$CFG->pixpath/u/$file.png\"".
" border=\"0\" width=\"$size\" height=\"$size\" alt=\"\" />";
}
if ($link) {
$output .= '</a>';
}
if ($returnstring) {
return $output;
} else {
echo $output;
}
}
/**
* Prints a summary of a user in a nice little box.
*
* @uses $CFG
* @uses $USER
* @param user $user A {@link $USER} object representing a user
* @param course $course A {@link $COURSE} object representing a course
*/
function print_user($user, $course) {
global $CFG, $USER;
static $string;
static $datestring;
static $countries;
static $isteacher;
static $isadmin;
if (empty($string)) { // Cache all the strings for the rest of the page
$string->email = get_string('email');
$string->location = get_string('location');
$string->lastaccess = get_string('lastaccess');
$string->activity = get_string('activity');
$string->unenrol = get_string('unenrol');
$string->loginas = get_string('loginas');
$string->fullprofile = get_string('fullprofile');
$string->role = get_string('role');
$string->name = get_string('name');
$string->never = get_string('never');
$datestring->day = get_string('day');
$datestring->days = get_string('days');
$datestring->hour = get_string('hour');
$datestring->hours = get_string('hours');
$datestring->min = get_string('min');
$datestring->mins = get_string('mins');
$datestring->sec = get_string('sec');
$datestring->secs = get_string('secs');
$countries = get_list_of_countries();
$isteacher = isteacher($course->id);
$isadmin = isadmin();
}
echo '<table width="80%" align="center" border="0" cellpadding="10" cellspacing="0" class="userinfobox">';
echo '<tr>';
echo '<td width="100" bgcolor="#ffffff" valign="top" class="userinfoboxside">';
print_user_picture($user->id, $course->id, $user->picture, true);
echo '</td>';
echo '<td width="100%" bgcolor="#ffffff" valign="top" class="userinfoboxsummary">';
echo '<font size="-1">';
echo '<font size="3"><strong>'.fullname($user, $isteacher).'</strong></font>';
echo '<p>';
if (!empty($user->role) and ($user->role <> $course->teacher)) {
echo $string->role .': '. $user->role .'<br />';
}
if ($user->maildisplay == 1 or ($user->maildisplay == 2 and $course->category and !isguest()) or $isteacher) {
echo $string->email .': <a href="mailto:'. $user->email .'">'. $user->email .'</a><br />';
}
if ($user->city or $user->country) {
echo $string->location .': ';
if ($user->city) {
echo $user->city;
}
if (!empty($countries[$user->country])) {
if ($user->city) {
echo ', ';
}
echo $countries[$user->country];
}
echo '<br />';
}
if ($user->lastaccess) {
echo $string->lastaccess .': '. userdate($user->lastaccess);
echo '&nbsp ('. format_time(time() - $user->lastaccess, $datestring) .')';
} else {
echo $string->lastaccess .': '. $string->never;
}
echo '</td><td valign="bottom" bgcolor="#ffffff" nowrap="nowrap" class="userinfoboxlinkcontent">';
echo '<font size="1">';
if ($isteacher) {
$timemidnight = usergetmidnight(time());
echo '<a href="'. $CFG->wwwroot .'/course/user.php?id='. $course->id .'&amp;user='. $user->id .'">'. $string->activity .'</a><br />';
if (!iscreator($user->id) or ($isadmin and !isadmin($user->id))) { // Includes admins
if ($course->category and isteacheredit($course->id) and isstudent($course->id, $user->id)) { // Includes admins
echo '<a href="'. $CFG->wwwroot .'/course/unenrol.php?id='. $course->id .'&amp;user='. $user->id .'">'. $string->unenrol .'</a><br />';
}
if ($USER->id != $user->id) {
echo '<a href="'. $CFG->wwwroot .'/course/loginas.php?id='. $course->id .'&amp;user='. $user->id .'">'. $string->loginas .'</a><br />';
}
}
}
echo '<a href="'. $CFG->wwwroot .'/user/view.php?id='. $user->id .'&amp;course='. $course->id .'">'. $string->fullprofile .'...</a>';
echo '</font>';
echo '</td></tr></table>';
}
/**
* Print a specified group's avatar.
*
* @param group $group A {@link group} object representing a group
* @param int $courseid ?
* @param boolean $large ?
* @param boolean $returnstring ?
* @param boolean $link ?
* @return string
* @todo Finish documenting this function
*/
function print_group_picture($group, $courseid, $large=false, $returnstring=false, $link=true) {
global $CFG;
static $isteacheredit;
if (!isset($isteacheredit)) {
$isteacheredit = isteacheredit($courseid);
}
if ($group->hidepicture and !$isteacheredit) {
return '';
}
if ($link or $isteacheredit) {
$output = '<a href="'. $CFG->wwwroot .'/course/group.php?id='. $courseid .'&amp;group='. $group->id .'">';
} else {
$output = '';
}
if ($large) {
$file = 'f1';
$size = 100;
} else {
$file = 'f2';
$size = 35;
}
if ($group->picture) { // Print custom group picture
if ($CFG->slasharguments) { // Use this method if possible for better caching
$output .= "<img align=\"middle\" src=\"$CFG->wwwroot/user/pixgroup.php/$group->id/$file.jpg\"".
" border=\"0\" width=\"$size\" height=\"$size\" alt=\"\" title=\"$group->name\"/>";
} else {
$output .= "<img align=\"middle\" src=\"$CFG->wwwroot/user/pixgroup.php?file=/$group->id/$file.jpg\"".
" border=\"0\" width=\"$size\" height=\"$size\" alt=\"\" title=\"$group->name\"/>";
}
}
if ($link or $isteacheredit) {
$output .= '</a>';
}
if ($returnstring) {
return $output;
} else {
echo $output;
}
}
/**
* Print a png image.
*
* @param string $url ?
* @param int $sizex ?
* @param int $sizey ?
* @param boolean $returnstring ?
* @param string $parameters ?
* @todo Finish documenting this function
*/
function print_png($url, $sizex, $sizey, $returnstring, $parameters='alt=""') {
global $CFG;
static $recentIE;
if (!isset($recentIE)) {
$recentIE = check_browser_version('MSIE', '5.0');
}
if ($recentIE) { // work around the HORRIBLE bug IE has with alpha transparencies
$output .= '<img src="'. $CFG->pixpath .'/spacer.gif" width="'. $sizex .'" height="'. $sizey .'"'.
' border="0" style="width: '. $sizex .'px; height: '. $sizey .'px; '.
' filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='.
"'$url', sizingMethod='scale') ".
' '. $parameters .' />';
} else {
$output .= '<img src="'. $url .'" border="0" width="'. $sizex .'" height="'. $sizey .'" '.
' '. $parameters .' />';
}
if ($returnstring) {
return $output;
} else {
echo $output;
}
}
/**
* Print a nicely formatted table.
*
* @uses $THEME
* @param array $table is an object with several properties.
* <ul<li>$table->head - An array of heading names.
* <li>$table->align - An array of column alignments
* <li>$table->size - An array of column sizes
* <li>$table->wrap - An array of "nowrap"s or nothing
* <li>$table->data[] - An array of arrays containing the data.
* <li>$table->width - A percentage of the page
* <li>$table->cellpadding - Padding on each cell
* <li>$table->cellspacing - Spacing between cells
* </ul>
* @return boolean
* @todo Finish documenting this function
*/
function print_table($table) {
global $THEME;
if (isset($table->align)) {
foreach ($table->align as $key => $aa) {
if ($aa) {
$align[$key] = ' align="'. $aa .'"';
} else {
$align[$key] = '';
}
}
}
if (isset($table->size)) {
foreach ($table->size as $key => $ss) {
if ($ss) {
$size[$key] = ' width="'. $ss .'"';
} else {
$size[$key] = '';
}
}
}
if (isset($table->wrap)) {
foreach ($table->wrap as $key => $ww) {
if ($ww) {
$wrap[$key] = ' nowrap="nowrap" ';
} else {
$wrap[$key] = '';
}
}
}
if (empty($table->width)) {
$table->width = '80%';
}
if (empty($table->cellpadding)) {
$table->cellpadding = '5';
}
if (empty($table->cellspacing)) {
$table->cellspacing = '1';
}
print_simple_box_start('center', $table->width, '#ffffff', 0);
echo '<table width="100%" border="0" align="center" ';
echo " cellpadding=\"$table->cellpadding\" cellspacing=\"$table->cellspacing\" class=\"generaltable\">\n";
$countcols = 0;
if (!empty($table->head)) {
$countcols = count($table->head);;
echo '<tr>';
foreach ($table->head as $key => $heading) {
if (!isset($size[$key])) {
$size[$key] = '';
}
if (!isset($align[$key])) {
$align[$key] = '';
}
echo '<th valign="top" '. $align[$key].$size[$key] .' nowrap="nowrap" class="generaltableheader">'. $heading .'</th>';
}
echo '</tr>'."\n";
}
if (!empty($table->data)) {
foreach ($table->data as $row) {
echo '<tr valign="top">';
if ($row == 'hr' and $countcols) {
echo '<td colspan="'. $countcols .'"><div class="tabledivider"></div></td>';
} else { /// it's a normal row of data
foreach ($row as $key => $item) {
if (!isset($size[$key])) {
$size[$key] = '';
}
if (!isset($align[$key])) {
$align[$key] = '';
}
if (!isset($wrap[$key])) {
$wrap[$key] = '';
}
echo '<td '. $align[$key].$size[$key].$wrap[$key] .' class="generaltablecell">'. $item .'</td>';
}
}
echo '</tr>'."\n";
}
}
echo '</table>'."\n";
print_simple_box_end();
return true;
}
/**
* Creates a nicely formatted table and returns it.
*
* @param array $table is an object with several properties.
* <ul<li>$table->head - An array of heading names.
* <li>$table->align - An array of column alignments
* <li>$table->size - An array of column sizes
* <li>$table->wrap - An array of "nowrap"s or nothing
* <li>$table->data[] - An array of arrays containing the data.
* <li>$table->class - A css class name
* <li>$table->fontsize - Is the size of all the text
* <li>$table->tablealign - Align the whole table
* <li>$table->width - A percentage of the page
* <li>$table->cellpadding - Padding on each cell
* <li>$table->cellspacing - Spacing between cells
* </ul>
* @return string
* @todo Finish documenting this function
*/
function make_table($table) {
if (isset($table->align)) {
foreach ($table->align as $key => $aa) {
if ($aa) {
$align[$key] = ' align="'. $aa .'"';
} else {
$align[$key] = '';
}
}
}
if (isset($table->size)) {
foreach ($table->size as $key => $ss) {
if ($ss) {
$size[$key] = ' width="'. $ss .'"';
} else {
$size[$key] = '';
}
}
}
if (isset($table->wrap)) {
foreach ($table->wrap as $key => $ww) {
if ($ww) {
$wrap[$key] = ' nowrap="nowrap" ';
} else {
$wrap[$key] = '';
}
}
}
if (empty($table->width)) {
$table->width = '80%';
}
if (empty($table->tablealign)) {
$table->tablealign = 'center';
}
if (empty($table->cellpadding)) {
$table->cellpadding = '5';
}
if (empty($table->cellspacing)) {
$table->cellspacing = '1';
}
if (empty($table->class)) {
$table->class = 'generaltable';
}
if (empty($table->fontsize)) {
$fontsize = '';
} else {
$fontsize = '<font size="'. $table->fontsize .'">';
}
$output = '<table width="'. $table->width .'" valign="top" align="'. $table->tablealign .'" ';
$output .= ' cellpadding="'. $table->cellpadding .'" cellspacing="'. $table->cellspacing .'" class="'. $table->class .'">'."\n";
if (!empty($table->head)) {
$output .= '<tr>';
foreach ($table->head as $key => $heading) {
if (!isset($size[$key])) {
$size[$key] = '';
}
if (!isset($align[$key])) {
$align[$key] = '';
}
$output .= '<th valign="top" '. $align[$key].$size[$key] .' nowrap="nowrap" class="'. $table->class .'header">'.$fontsize.$heading.'</th>';
}
$output .= '</tr>'."\n";
}
foreach ($table->data as $row) {
$output .= '<tr valign="top">';
foreach ($row as $key => $item) {
if (!isset($size[$key])) {
$size[$key] = '';
}
if (!isset($align[$key])) {
$align[$key] = '';
}
if (!isset($wrap[$key])) {
$wrap[$key] = '';
}
$output .= '<td '. $align[$key].$size[$key].$wrap[$key] .' class="'. $table->class .'cell">'. $fontsize . $item .'</td>';
}
$output .= '</tr>'."\n";
}
$output .= '</table>'."\n";
return $output;
}
/**
* Prints a basic textarea field.
*
* @uses $CFG
* @param boolean $usehtmleditor ?
* @param int $rows ?
* @param int $cols ?
* @param null $width <b>Legacy field no longer used!</b>
* @param null $height <b>Legacy field no longer used!</b>
* @param string $name ?
* @param string $value ?
* @param int $courseid ?
* @todo Finish documenting this function
*/
function print_textarea($usehtmleditor, $rows, $cols, $width, $height, $name, $value='', $courseid=0) {
/// $width and height are legacy fields and no longer used
global $CFG, $course;
if (empty($courseid)) {
if (!empty($course->id)) { // search for it in global context
$courseid = $course->id;
}
}
if ($usehtmleditor) {
if (!empty($courseid) and isteacher($courseid)) {
echo '<script type="text/javascript" src="'. $CFG->wwwroot .'/lib/editor/htmlarea.php?id='. $courseid .'"></script>'."\n";
} else {
echo '<script type="text/javascript" src="'. $CFG->wwwroot .'/lib/editor/htmlarea.php"></script>'."\n";
}
echo '<script type="text/javascript" src="'. $CFG->wwwroot .'/lib/editor/dialog.js"></script>'."\n";
echo '<script type="text/javascript" src="'. $CFG->wwwroot .'/lib/editor/lang/en.php"></script>'."\n";
echo '<script type="text/javascript" src="'. $CFG->wwwroot .'/lib/editor/popupwin.js"></script>'."\n";
if ($rows < 10) {
$rows = 10;
}
if ($cols < 65) {
$cols = 65;
}
}
echo '<textarea id="'. $name .'" name="'. $name .'" rows="'. $rows .'" cols="'. $cols .'">';
p($value);
echo '</textarea>'."\n";
}
/**
* Legacy function, provided for backward compatability.
* This method now simply calls {@link use_html_editor()}
*
* @deprecated Use {@link use_html_editor()} instead.
* @param string $name Form element to replace with HTMl editor by name
* @todo Finish documenting this function
*/
function print_richedit_javascript($form, $name, $source='no') {
use_html_editor($name);
}
/**
* Sets up the HTML editor on textareas in the current page.
* If a field name is provided, then it will only be
* applied to that field - otherwise it will be used
* on every textarea in the page.
*
* In most cases no arguments need to be supplied
*
* @param string $name Form element to replace with HTMl editor by name
*/
function use_html_editor($name='') {
echo '<script language="javascript" type="text/javascript" defer="defer">'."\n";
print_editor_config();
if (empty($name)) {
echo "\n".'HTMLArea.replaceAll(config);'."\n";
} else {
echo "\nHTMLArea.replace('$name', config);\n";
}
echo '</script>'."\n";
}
/**
* Returns a turn edit on/off button for course in a self contained form.
* Used to be an icon, but it's now a simple form button
*
* @uses $CFG
* @uses $USER
* @param int $courseid The course to update by id as found in 'course' table
* @return string
*/
function update_course_icon($courseid) {
global $CFG, $USER;
if (isteacheredit($courseid)) {
if (!empty($USER->editing)) {
$string = get_string('turneditingoff');
$edit = 'off';
} else {
$string = get_string('turneditingon');
$edit = 'on';
}
return "<form target=\"$CFG->framename\" method=\"get\" action=\"$CFG->wwwroot/course/view.php\">".
"<input type=\"hidden\" name=\"id\" value=\"$courseid\" />".
"<input type=\"hidden\" name=\"edit\" value=\"$edit\" />".
"<input type=\"submit\" value=\"$string\" /></form>";
}
}
/**
* Prints the editing button on a module "view" page
*
* @uses $CFG
* @param type description
* @todo Finish documenting this function
*/
function update_module_button($moduleid, $courseid, $string) {
global $CFG, $USER;
if (isteacheredit($courseid)) {
$string = get_string('updatethis', '', $string);
return "<form target=\"$CFG->framename\" method=\"get\" action=\"$CFG->wwwroot/course/mod.php\">".
"<input type=\"hidden\" name=\"update\" value=\"$moduleid\" />".
"<input type=\"hidden\" name=\"return\" value=\"true\" />".
"<input type=\"hidden\" name=\"sesskey\" value=\"$USER->sesskey\" />".
"<input type=\"submit\" value=\"$string\" /></form>";
} else {
return '';
}
}
/**
* Prints the editing button on a category page
*
* @uses $CFG
* @uses $USER
* @param int $categoryid ?
* @return string
* @todo Finish documenting this function
*/
function update_category_button($categoryid) {
global $CFG, $USER;
if (iscreator()) {
if (!empty($USER->categoryediting)) {
$string = get_string('turneditingoff');
$edit = 'off';
} else {
$string = get_string('turneditingon');
$edit = 'on';
}
return "<form target=\"$CFG->framename\" method=\"get\" action=\"$CFG->wwwroot/course/category.php\">".
"<input type=\"hidden\" name=\"id\" value=\"$categoryid\" />".
"<input type=\"hidden\" name=\"edit\" value=\"$edit\" />".
"<input type=\"hidden\" name=\"sesskey\" value=\"$USER->sesskey\" />".
"<input type=\"submit\" value=\"$string\" /></form>";
}
}
/**
* Prints the editing button on categories listing
*
* @uses $CFG
* @uses $USER
* @return string
*/
function update_categories_button() {
global $CFG, $USER;
if (isadmin()) {
if (!empty($USER->categoriesediting)) {
$string = get_string('turneditingoff');
$edit = 'off';
} else {
$string = get_string('turneditingon');
$edit = 'on';
}
return "<form target=\"$CFG->framename\" method=\"get\" action=\"$CFG->wwwroot/course/index.php\">".
'<input type="hidden" name="edit" value="'. $edit .'" />'.
'<input type="hidden" name="sesskey" value="'.$USER->sesskey.'" />'.
'<input type="submit" value="'. $string .'" /></form>';
}
}
/**
* Prints the editing button on group page
*
* @uses $CFG
* @uses $USER
* @param int $courseid The course group is associated with
* @param int $groupid The group to update
* @return string
*/
function update_group_button($courseid, $groupid) {
global $CFG, $USER;
if (isteacheredit($courseid)) {
$string = get_string('editgroupprofile');
return "<form target=\"$CFG->framename\" method=\"get\" action=\"$CFG->wwwroot/course/group.php\">".
'<input type="hidden" name="id" value="'. $courseid .'" />'.
'<input type="hidden" name="group" value="'. $groupid .'" />'.
'<input type="hidden" name="edit" value="on" />'.
'<input type="submit" value="'. $string .'" /></form>';
}
}
/**
* Prints the editing button on groups page
*
* @uses $CFG
* @uses $USER
* @param int $courseid The id of the course to be edited
* @return string
* @todo Finish documenting this function
*/
function update_groups_button($courseid) {
global $CFG, $USER;
if (isteacheredit($courseid)) {
if (!empty($USER->groupsediting)) {
$string = get_string('turneditingoff');
$edit = 'off';
} else {
$string = get_string('turneditingon');
$edit = 'on';
}
return "<form target=\"$CFG->framename\" method=\"get\" action=\"$CFG->wwwroot/course/groups.php\">".
"<input type=\"hidden\" name=\"id\" value=\"$courseid\" />".
"<input type=\"hidden\" name=\"edit\" value=\"$edit\" />".
"<input type=\"submit\" value=\"$string\" /></form>";
}
}
/**
* Prints an appropriate group selection menu
*
* @uses VISIBLEGROUPS
* @param array $groups ?
* @param int $groupmode ?
* @param string $currentgroup ?
* @param string $urlroot ?
* @todo Finish documenting this function
*/
function print_group_menu($groups, $groupmode, $currentgroup, $urlroot) {
/// Add an "All groups" to the start of the menu
$groupsmenu[0] = get_string('allparticipants');
foreach ($groups as $key => $groupname) {
$groupsmenu[$key] = $groupname;
}
echo '<table><tr><td align="right">';
if ($groupmode == VISIBLEGROUPS) {
print_string('groupsvisible');
} else {
print_string('groupsseparate');
}
echo ':';
echo '</td><td nowrap="nowrap" align="left">';
popup_form($urlroot.'&amp;group=', $groupsmenu, 'selectgroup', $currentgroup, '', '', '', false, 'self');
echo '</tr></table>';
}
/**
* Given a course and a (current) coursemodule
* This function returns a small popup menu with all the
* course activity modules in it, as a navigation menu
* The data is taken from the serialised array stored in
* the course record
*
* @param course $course A {@link $COURSE} object.
* @param course $cm A {@link $COURSE} object.
* @param string $targetwindow ?
* @return string
* @todo Finish documenting this function
*/
function navmenu($course, $cm=NULL, $targetwindow='self') {
global $CFG;
if ($cm) {
$cm = $cm->id;
}
if ($course->format == 'weeks') {
$strsection = get_string('week');
} else {
$strsection = get_string('topic');
}
if (!$modinfo = unserialize($course->modinfo)) {
return '';
}
$isteacher = isteacher($course->id);
$section = -1;
$selected = '';
$url = '';
$previousmod = NULL;
$backmod = NULL;
$nextmod = NULL;
$selectmod = NULL;
$logslink = NULL;
$flag = false;
$menu = array();
$strjumpto = get_string('jumpto');
$sections = get_records('course_sections','course',$course->id,'section','section,visible,summary');
foreach ($modinfo as $mod) {
if ($mod->mod == 'label') {
continue;
}
if ($mod->section > 0 and $section <> $mod->section) {
$thissection = $sections[$mod->section];
if ($thissection->visible or !$course->hiddensections or $isteacher) {
$thissection->summary = strip_tags($thissection->summary);
if ($course->format == 'weeks' or empty($thissection->summary)) {
$menu[] = '-------------- '. $strsection ." ". $mod->section .' --------------';
} else {
if (strlen($thissection->summary) < 47) {
$menu[] = '-- '.$thissection->summary;
} else {
$menu[] = '-- '.substr($thissection->summary, 0, 50).'...';
}
}
}
}
$section = $mod->section;
//Only add visible or teacher mods to jumpmenu
if ($mod->visible or $isteacher) {
$url = $mod->mod .'/view.php?id='. $mod->cm;
if ($flag) { // the current mod is the "next" mod
$nextmod = $mod;
$flag = false;
}
if ($cm == $mod->cm) {
$selected = $url;
$selectmod = $mod;
$backmod = $previousmod;
$flag = true; // set flag so we know to use next mod for "next"
$mod->name = $strjumpto;
$strjumpto = '';
} else {
$mod->name = strip_tags(urldecode($mod->name));
if (strlen($mod->name) > 55) {
$mod->name = substr($mod->name, 0, 50).'...';
}
if (!$mod->visible) {
$mod->name = '('.$mod->name.')';
}
}
$menu[$url] = $mod->name;
$previousmod = $mod;
}
}
if ($selectmod and $isteacher) {
$logslink = "<td><a target=\"$CFG->framename\" href=".
"\"$CFG->wwwroot/course/log.php?chooselog=1&amp;user=0&amp;date=0&amp;id=$course->id&amp;modid=$selectmod->cm\">".
"<img border=\"0\" height=\"16\" width=\"16\" src=\"$CFG->pixpath/i/log.gif\" alt=\"\" /></a></td>";
}
if ($backmod) {
$backmod = "<form action=\"$CFG->wwwroot/mod/$backmod->mod/view.php\" target=\"$CFG->framename\">".
"<input type=\"hidden\" name=\"id\" value=\"$backmod->cm\" />".
"<input type=\"submit\" value=\"&lt;\" /></form>";
}
if ($nextmod) {
$nextmod = "<form action=\"$CFG->wwwroot/mod/$nextmod->mod/view.php\" target=\"$CFG->framename\">".
"<input type=\"hidden\" name=\"id\" value=\"$nextmod->cm\" />".
"<input type=\"submit\" value=\"&gt;\" /></form>";
}
return '<table><tr>'.$logslink .'<td>'. $backmod .'</td><td>' .
popup_form($CFG->wwwroot .'/mod/', $menu, 'navmenu', $selected, $strjumpto,
'', '', true, $targetwindow).
'</td><td>'. $nextmod .'</td></tr></table>';
}
/**
* Prints form items with the names $day, $month and $year
*
* @param int $day ?
* @param int $month ?
* @param int $year ?
* @param int $currenttime A default timestamp in GMT
* @todo Finish documenting this function
*/
function print_date_selector($day, $month, $year, $currenttime=0) {
if (!$currenttime) {
$currenttime = time();
}
$currentdate = usergetdate($currenttime);
for ($i=1; $i<=31; $i++) {
$days[$i] = $i;
}
for ($i=1; $i<=12; $i++) {
$months[$i] = userdate(gmmktime(12,0,0,$i,1,2000), "%B");
}
for ($i=2000; $i<=2010; $i++) {
$years[$i] = $i;
}
choose_from_menu($days, $day, $currentdate['mday'], '');
choose_from_menu($months, $month, $currentdate['mon'], '');
choose_from_menu($years, $year, $currentdate['year'], '');
}
/**
*Prints form items with the names $hour and $minute
*
* @param ? $hour ?
* @param ? $minute ?
* @param $currenttime A default timestamp in GMT
* @param int $step ?
* @todo Finish documenting this function
*/
function print_time_selector($hour, $minute, $currenttime=0, $step=5) {
if (!$currenttime) {
$currenttime = time();
}
$currentdate = usergetdate($currenttime);
if ($step != 1) {
$currentdate['minutes'] = ceil($currentdate['minutes']/$step)*$step;
}
for ($i=0; $i<=23; $i++) {
$hours[$i] = sprintf("%02d",$i);
}
for ($i=0; $i<=59; $i+=$step) {
$minutes[$i] = sprintf("%02d",$i);
}
choose_from_menu($hours, $hour, $currentdate['hours'], '');
choose_from_menu($minutes, $minute, $currentdate['minutes'], '');
}
/**
* Prints time limit value selector
*
* @uses $CFG
* @param int $timelimit ?
* @param string $unit ?
* @todo Finish documenting this function
*/
function print_timer_selector($timelimit = 0, $unit = '') {
global $CFG;
if ($unit) {
$unit = ' '.$unit;
}
// Max timelimit is sessiontimeout - 10 minutes.
$maxvalue = ($CFG->sessiontimeout / 60) - 10;
for ($i=1; $i<=$maxvalue; $i++) {
$minutes[$i] = $i.$unit;
}
choose_from_menu($minutes, 'timelimit', $timelimit, get_string('none'));
}
/**
* Prints a grade menu (as part of an existing form) with help
* Showing all possible numerical grades and scales
*
* @uses $CFG
* @param int $courseid ?
* @param string $name ?
* @param string $current ?
* @param boolean $includenograde ?
* @todo Finish documenting this function
*/
function print_grade_menu($courseid, $name, $current, $includenograde=true) {
global $CFG;
$strscale = get_string('scale');
$strscales = get_string('scales');
$scales = get_scales_menu($courseid);
foreach ($scales as $i => $scalename) {
$grades[-$i] = $strscale .': '. $scalename;
}
if ($includenograde) {
$grades[0] = get_string('nograde');
}
for ($i=100; $i>=1; $i--) {
$grades[$i] = $i;
}
choose_from_menu($grades, $name, $current, '');
$helpicon = $CFG->pixpath .'/help.gif';
$linkobject = "<img align=\"middle\" border=\"0\" height=\"17\" width=\"22\" alt=\"$strscales\" src=\"$helpicon\" />";
link_to_popup_window ('/course/scales.php?id='. $courseid .'&amp;list=true', 'ratingscales',
$linkobject, 400, 500, $strscales);
}
/**
* Prints a scale menu (as part of an existing form) including help button
* Just like {@link print_grade_menu()} but without the numeric grades
*
* @param int $courseid ?
* @param string $name ?
* @param string $current ?
* @todo Finish documenting this function
*/
function print_scale_menu