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<?php
/**
* URL plugin for the PHP Fat-Free Framework
* Allows for easy building and manipulation of complicated URLs.
*
* PHP version 5
*
* @category Plugin
* @package URL
* @author Steven Bredenberg <steven@killsaw.com>
* @copyright 2010 Steven Bredenberg
* @license GPL 2.0
* @link http://github.com/killsaw/f3-plugins
*/
/**
* URL plugin.
*
* @category Plugin
* @package URL
* @author Steven Bredenberg <steven@killsaw.com>
* @license GPL 2.0
* @link http://github.com/killsaw/f3-plugins
*/
class URL extends Core
{
//! Minimum framework version required to run
const F3_Minimum='1.4.0';
//! Locale-specific error/exception messages
const
TEXT_GENERIC_ERROR='An error occurred. {@CONTEXT}',
TEXT_NO_PROPERTY="Property '{@CONTEXT}' does not exist.",
TEXT_NO_METHOD="Method '{@CONTEXT}' does not exist.";
/**
* URL Scheme (e.g. 'http')
* @type string
* @access protected
*/
protected $scheme = null;
/**
* URL Host (e.g. 'www.cnn.com')
* @type string
* @access protected
*/
protected $host = null;
/**
* URL Port (e.g. 80)
* @type int
* @access protected
*/
protected $port = null;
/**
* URL HTTP auth password.
* @type string
* @access protected
*/
protected $user = null;
/**
* URL HTTP auth username.
* @type string
* @access protected
*/
protected $pass = null;
/**
* URL Path (e.g. '/index.php')
* @type string
* @access protected
*/
protected $path = null;
/**
* URL query params (e.g. ('id'=>1, 's'=>'search'))
* @type array
* @access protected
*/
protected $query = array();
/**
* URL Fragment (e.g. '#page-top')
* @type string
* @access protected
*/
protected $fragment = null;
/**
* Static constructor alias.
*
* @param string $url Optional string URL to build object from.
*
* @return URL
* @access public
*/
public static function url($url=null)
{
return new URL($url);
}
/**
* Set username and password for URL
*
* @param string $user HTTP auth username
* @param string $pass HTTP auth password
*
* @return URL
* @access public
*/
public function setLogin($user, $pass)
{
$this->user = $user;
$this->pass = $pass;
return $this;
}
/**
* Set query parameters for URL
*
* @param string|array $query Query string or key=>val array.
*
* @return URL
* @access public
*/
public function setQuery($query)
{
if (!is_array($query)) {
$parts = explode('&', urldecode($query));
$pairs = array();
foreach ($parts as $p) {
list($k, $v) = explode('=', $p, 2);
$pairs[$k] = $v;
}
$query = $pairs;
}
$this->query = $query;
return $this;
}
/**
* Set a single query parameter for URL.
*
* @param string $name Query param key.
* @param string $value Query param value.
*
* @return URL
* @access public
*/
public function setParam($name, $value)
{
$this->query[$name] = $value;
return $this;
}
/**
* Get a query parameter value.
*
* @param string $name Query param key.
*
* @return string|null String if value set, null otherwise.
* @access public
*/
public function getParam($name)
{
if (array_key_exists($name, $this->query)) {
return $this->query[$name];
}
return null;
}
/**
Retrieves data from URL.
@param $cookies array Cookies for request.
@param $referer string Referring URL.
@param $agent string User-agent for request.
@return string
@public
**/
/**
* Retrieves data from URL.
*
* @param array $cookies Optional array of key=>value cookies.
* @param string $referer Optional HTTP Referer
* @param string $agent Optional User-agent (e.g. Internet Explorer 6.0)
*
* @return string|bool FALSE on failure, string otherwise.
* @access public
*/
public function get($cookies=array(), $referer=null, $agent=null)
{
$headers = '';
if (is_null($agent)) {
$agent = 'Mozilla/5.0 (Windows; U; MSIE 9.0; WIndows NT 9.0; en-US)';
}
if (!is_null($referer)) {
$headers .= "Referer: $referer\r\n";
}
if (count($cookies)) {
$cookie_pairs = array();
foreach ($cookies as $k=>$v) {
$cookie_pairs[] = sprintf("%s=%s", $k, $v);
}
$headers .= "Cookies: ".join("; ", $cookie_pairs)."\r\n";
}
$opts = array(
'http'=>array(
'method'=>'GET',
'user_agent'=>$agent,
'headers'=>$headers
)
);
return file_get_contents(
$this->toString(), null,
stream_context_create($opts)
);
}
/**
* Returns HTML link from current URL.
*
* @param string $with_name Optional label for link.
*
* @return string
* @access public
*/
public function toLink($with_name=null)
{
if (is_null($with_name)) {
$with_name = $this->toString();
}
return sprintf('<a href="%s">%s</a>', $this->toString(), $with_name);
}
/**
* Returns URL without path, query, or fragment.
*
* @return string
* @access public
*/
public function getBaseURL()
{
return $this->toString($just_base = true);
}
/**
* Returns full string representation of URL.
*
* @param boolean $just_base Return part or entirety of URL.
*
* @return string
* @access public
*/
public function toString($just_base=false)
{
if (empty($this->scheme)) {
$this->scheme = 'http';
}
if (empty($this->path) || $this->path[0] !== '/') {
$this->path = '/'.$this->path;
}
$login = '';
if (!empty($this->user) && !empty($this->pass)) {
$login = sprintf("%s:%s@", $this->user, $this->pass);
}
$url = sprintf("%s://%s%s", $this->scheme, $login, $this->host);
if (!empty($this->port) && $this->port != 80) {
$url .= ':'.$this->port;
}
// Skip the path, query and fragment.
if ($just_base) {
return $url;
}
$url .= $this->path;
if (count($this->query)) {
$url .= '?'.http_build_query($this->query);
}
if (!empty($this->fragment)) {
$url .= '#'.$this->fragment;
}
return $url;
}
/**
* Returns string representation of object.
*
* @return string
* @access public
* @magic
*/
public function __toString()
{
return $this->toString();
}
/**
* Assign value to class property.
*
* @param string $name Name of property
* @param mixed $value Value to assign to property.
*
* @return string
* @access public
*/
public function __set($name, $value)
{
if (!property_exists($this, $name)) {
self::$global['CONTEXT'] = $name;
trigger_error(self::TEXT_NO_PROPERTY);
}
$this->$name = $value;
return $value;
}
/**
* Return value of class property.
*
* @param string $name Name of property
*
* @return string
* @access public
*/
public function __get($name)
{
if (!property_exists($this, $name)) {
self::$global['CONTEXT'] = $name;
trigger_error(self::TEXT_NO_PROPERTY);
}
return $this->$name;
}
/**
* Intercepts method calls to this class.
*
* @param string $name Name of method
* @param array $args Arguments passed to method
*
* @return URL
* @access public
* @magic
*/
public function __call($name, $args)
{
if (preg_match('/^set(.+)/', $name, $matches)) {
$property = strtolower($matches[1]);
if (property_exists($this, $property)) {
$this->$property = $args[0];
return $this;
}
} else {
self::$global['CONTEXT'] = $name;
trigger_error(self::TEXT_NO_METHOD);
}
}
/**
* Class constructor
*
* @param string $url URL string to build object from.
*
* @access public
* @magic
*/
public function __construct($url=null)
{
if (!is_null($url)) {
foreach (parse_url($url) as $k=>$v) {
call_user_func(array($this, "set$k"), $v);
}
}
}
}