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<?php
/** Get database connection
* @return Min_DB
*/
function connection() {
// can be used in customization, $connection is minified
global $connection;
return $connection;
}

/** Get Adminer object
* @return Adminer
*/
function adminer() {
global $adminer;
return $adminer;
}

/** Unescape database identifier
* @param string text inside ``
* @return string
*/
function idf_unescape($idf) {
$last = substr($idf, -1);
return str_replace($last . $last, $last, substr($idf, 1, -1));
}

/** Escape string to use inside ''
* @param string
* @return string
*/
function escape_string($val) {
return substr(q($val), 1, -1);
}

/** Disable magic_quotes_gpc
* @param array e.g. (&$_GET, &$_POST, &$_COOKIE)
* @param bool whether to leave values as is
* @return null modified in place
*/
function remove_slashes($process, $filter = false) {
if (get_magic_quotes_gpc()) {
while (list($key, $val) = each($process)) {
foreach ($val as $k => $v) {
unset($process[$key][$k]);
if (is_array($v)) {
$process[$key][stripslashes($k)] = $v;
$process[] = &$process[$key][stripslashes($k)];
} else {
$process[$key][stripslashes($k)] = ($filter ? $v : stripslashes($v));
}
}
}
}
}

/** Escape or unescape string to use inside form []
* @param string
* @param bool
* @return string
*/
function bracket_escape($idf, $back = false) {
// escape brackets inside name="x[]"
static $trans = array(':' => ':1', ']' => ':2', '[' => ':3');
return strtr($idf, ($back ? array_flip($trans) : $trans));
}

/** Escape for HTML
* @param string
* @return string
*/
function h($string) {
return htmlspecialchars(str_replace("\0", "", $string), ENT_QUOTES);
}

/** Escape for TD
* @param string
* @return string
*/
function nbsp($string) {
return (trim($string) != "" ? h($string) : "&nbsp;");
}

/** Convert \n to <br>
* @param string
* @return string
*/
function nl_br($string) {
return str_replace("\n", "<br>", $string); // nl2br() uses XHTML before PHP 5.3
}

/** Generate HTML checkbox
* @param string
* @param string
* @param bool
* @param string
* @param string
* @param bool
* @return string
*/
function checkbox($name, $value, $checked, $label = "", $onclick = "", $jsonly = false) {
static $id = 0;
$id++;
$return = "<input type='checkbox' name='$name' value='" . h($value) . "'" . ($checked ? " checked" : "") . ($onclick ? ' onclick="' . h($onclick) . '"' : '') . ($jsonly ? " class='jsonly'" : "") . " id='checkbox-$id'>";
return ($label != "" ? "<label for='checkbox-$id'>$return" . h($label) . "</label>" : $return);
}

/** Generate list of HTML options
* @param array array of strings or arrays (creates optgroup)
* @param mixed
* @param bool always use array keys for value="", otherwise only string keys are used
* @return string
*/
function optionlist($options, $selected = null, $use_keys = false) {
$return = "";
foreach ($options as $k => $v) {
$opts = array($k => $v);
if (is_array($v)) {
$return .= '<optgroup label="' . h($k) . '">';
$opts = $v;
}
foreach ($opts as $key => $val) {
$return .= '<option' . ($use_keys || is_string($key) ? ' value="' . h($key) . '"' : '') . (($use_keys || is_string($key) ? (string) $key : $val) === $selected ? ' selected' : '') . '>' . h($val);
}
if (is_array($v)) {
$return .= '</optgroup>';
}
}
return $return;
}

/** Generate HTML radio list
* @param string
* @param array
* @param string
* @param string true for no onchange, false for radio
* @return string
*/
function html_select($name, $options, $value = "", $onchange = true) {
if ($onchange) {
return "<select name='" . h($name) . "'" . (is_string($onchange) ? ' onchange="' . h($onchange) . '"' : "") . ">" . optionlist($options, $value) . "</select>";
}
$return = "";
foreach ($options as $key => $val) {
$return .= "<label><input type='radio' name='" . h($name) . "' value='" . h($key) . "'" . ($key == $value ? " checked" : "") . ">" . h($val) . "</label>";
}
return $return;
}

/** Get onclick confirmation
* @param string JavaScript expression
* @param bool stop event propagation
* @return string
*/
function confirm($count = "", $stop = false) {
return " onclick=\"" . ($stop ? "eventStop(event); " : "") . "return confirm('" . lang('Are you sure?') . ($count ? " (' + $count + ')" : "") . "');\"";
}

/** Print header for hidden fieldset (close by </div></fieldset>)
* @param string
* @param string
* @param bool
* @param string
* @return null
*/
function print_fieldset($id, $legend, $visible = false, $onclick = "") {
echo "<fieldset><legend><a href='#fieldset-$id' onclick=\"" . h($onclick) . "return !toggle('fieldset-$id');\">$legend</a></legend><div id='fieldset-$id'" . ($visible ? "" : " class='hidden'") . ">\n";
}

/** Return class='active' if $bold is true
* @param bool
* @return string
*/
function bold($bold) {
return ($bold ? " class='active'" : "");
}

/** Generate class for odd rows
* @param string return this for odd rows, empty to reset counter
* @return string
*/
function odd($return = ' class="odd"') {
static $i = 0;
if (!$return) { // reset counter
$i = -1;
}
return ($i++ % 2 ? $return : '');
}

/** Escape string for JavaScript apostrophes
* @param string
* @return string
*/
function js_escape($string) {
return addcslashes($string, "\r\n'\\/"); // slash for <script>
}

/** Print one row in JSON object
* @param string or "" to close the object
* @param string
* @return null
*/
function json_row($key, $val = null) {
static $first = true;
if ($first) {
echo "{";
}
if ($key != "") {
echo ($first ? "" : ",") . "\n\t\"" . addcslashes($key, "\r\n\"\\") . '": ' . (isset($val) ? '"' . addcslashes($val, "\r\n\"\\") . '"' : 'undefined');
$first = false;
} else {
echo "\n}\n";
$first = true;
}
}

/** Get INI boolean value
* @param string
* @return bool
*/
function ini_bool($ini) {
$val = ini_get($ini);
return (eregi('^(on|true|yes)$', $val) || (int) $val); // boolean values set by php_value are strings
}

/** Check if SID is neccessary
* @return bool
*/
function sid() {
static $return;
if (!isset($return)) { // restart_session() defines SID
$return = (SID && !($_COOKIE && ini_bool("session.use_cookies"))); // $_COOKIE - don't pass SID with permanent login
}
return $return;
}

/** Shortcut for $connection->quote($string)
* @param string
* @return string
*/
function q($string) {
global $connection;
return $connection->quote($string);
}

/** Get list of values from database
* @param string
* @param mixed
* @return array
*/
function get_vals($query, $column = 0) {
global $connection;
$return = array();
$result = $connection->query($query);
if (is_object($result)) {
while ($row = $result->fetch_row()) {
$return[] = $row[$column];
}
}
return $return;
}

/** Get keys from first column and values from second
* @param string
* @param Min_DB
* @return array
*/
function get_key_vals($query, $connection2 = null) {
global $connection;
if (!is_object($connection2)) {
$connection2 = $connection;
}
$return = array();
$result = $connection2->query($query);
if (is_object($result)) {
while ($row = $result->fetch_row()) {
$return[$row[0]] = $row[1];
}
}
return $return;
}

/** Get all rows of result
* @param string
* @param Min_DB
* @param string
* @return array associative
*/
function get_rows($query, $connection2 = null, $error = "<p class='error'>") {
global $connection;
$conn = (is_object($connection2) ? $connection2 : $connection);
$return = array();
$result = $conn->query($query);
if (is_object($result)) { // can return true
while ($row = $result->fetch_assoc()) {
$return[] = $row;
}
} elseif (!$result && !is_object($connection2) && $error && defined("PAGE_HEADER")) {
echo $error . error() . "\n";
}
return $return;
}

/** Find unique identifier of a row
* @param array
* @param array result of indexes()
* @return array
*/
function unique_array($row, $indexes) {
foreach ($indexes as $index) {
if (ereg("PRIMARY|UNIQUE", $index["type"])) {
$return = array();
foreach ($index["columns"] as $key) {
if (!isset($row[$key])) { // NULL is ambiguous
continue 2;
}
$return[$key] = $row[$key];
}
return $return;
}
}
$return = array();
foreach ($row as $key => $val) {
if (!preg_match('~^(COUNT\\((\\*|(DISTINCT )?`(?:[^`]|``)+`)\\)|(AVG|GROUP_CONCAT|MAX|MIN|SUM)\\(`(?:[^`]|``)+`\\))$~', $key)) { //! columns looking like functions
$return[$key] = $val;
}
}
return $return;
}

/** Create SQL condition from parsed query string
* @param array parsed query string
* @return string
*/
function where($where) {
global $jush;
$return = array();
foreach ((array) $where["where"] as $key => $val) {
$return[] = idf_escape(bracket_escape($key, 1)) // 1 - back
. (($jush == "sql" && ereg('\\.', $val)) || $jush == "mssql" ? " LIKE " . exact_value(addcslashes($val, "%_\\")) : " = " . exact_value($val)) // LIKE because of floats, but slow with ints, in MS SQL because of text
; //! enum and set
}
foreach ((array) $where["null"] as $key) {
$return[] = idf_escape($key) . " IS NULL";
}
return implode(" AND ", $return);
}

/** Create SQL condition from query string
* @param string
* @return string
*/
function where_check($val) {
parse_str($val, $check);
remove_slashes(array(&$check));
return where($check);
}

/** Create query string where condition from value
* @param int condition order
* @param string column identifier
* @param string
* @return string
* @return string
*/
function where_link($i, $column, $value, $operator = "=") {
return "&where%5B$i%5D%5Bcol%5D=" . urlencode($column) . "&where%5B$i%5D%5Bop%5D=" . urlencode((isset($value) ? $operator : "IS NULL")) . "&where%5B$i%5D%5Bval%5D=" . urlencode($value);
}

/** Set cookie valid for 1 month
* @param string
* @param string
* @return bool
*/
function cookie($name, $value) {
global $HTTPS;
$params = array(
$name,
(ereg("\n", $value) ? "" : $value), // HTTP Response Splitting protection in PHP < 5.1.2
time() + 2592000, // 2592000 - 30 days
preg_replace('~\\?.*~', '', $_SERVER["REQUEST_URI"]),
"",
$HTTPS
);
if (version_compare(PHP_VERSION, '5.2.0') >= 0) {
$params[] = true; // HttpOnly
}
return call_user_func_array('setcookie', $params);
}

/** Restart stopped session
* @return null
*/
function restart_session() {
if (!ini_bool("session.use_cookies")) {
session_start();
}
}

/** Get session variable for current server
* @param string
* @return mixed
*/
function &get_session($key) {
return $_SESSION[$key][DRIVER][SERVER][$_GET["username"]];
}

/** Set session variable for current server
* @param string
* @param mixed
* @return mixed
*/
function set_session($key, $val) {
$_SESSION[$key][DRIVER][SERVER][$_GET["username"]] = $val; // used also in auth.inc.php
}

/** Get authenticated URL
* @param string
* @param string
* @param string
* @return string
*/
function auth_url($driver, $server, $username) {
global $drivers;
preg_match('~([^?]*)\\??(.*)~', remove_from_uri(implode("|", array_keys($drivers)) . "|username|" . session_name()), $match);
return "$match[1]?"
. (sid() ? SID . "&" : "")
. ($driver != "server" || $server != "" ? urlencode($driver) . "=" . urlencode($server) . "&" : "")
. "username=" . urlencode($username)
. ($match[2] ? "&$match[2]" : "")
;
}

/** Find whether it is an AJAX request
* @return bool
*/
function is_ajax() {
return ($_SERVER["HTTP_X_REQUESTED_WITH"] == "XMLHttpRequest");
}

/** Send Location header and exit
* @param string null to only set a message
* @param string
* @return null
*/
function redirect($location, $message = null) {
if (isset($message)) {
restart_session();
$_SESSION["messages"][preg_replace('~^[^?]*~', '', (isset($location) ? $location : $_SERVER["REQUEST_URI"]))][] = $message;
}
if (isset($location)) {
if ($location == "") {
$location = ".";
}
header((is_ajax() ? "X-AJAX-Redirect" : "Location") . ": $location");
exit;
}
}

/** Execute query and redirect if successful
* @param string
* @param string
* @param string
* @param bool
* @param bool
* @param bool
* @return bool
*/
function query_redirect($query, $location, $message, $redirect = true, $execute = true, $failed = false) {
global $connection, $error, $adminer;
if ($execute) {
$failed = !$connection->query($query);
}
$sql = "";
if ($query) {
$sql = $adminer->messageQuery("$query;");
}
if ($failed) {
$error = error() . $sql;
return false;
}
if ($redirect) {
redirect($location, $message . $sql);
}
return true;
}

/** Execute and remember query
* @param string null to return remembered queries, end with ';' to use DELIMITER
* @return Min_Result
*/
function queries($query = null) {
global $connection;
static $queries = array();
if (!isset($query)) {
// return executed queries without parameter
return implode(";\n", $queries);
}
$queries[] = (ereg(';$', $query) ? "DELIMITER ;;\n$query;\nDELIMITER " : $query);
return $connection->query($query);
}

/** Apply command to all array items
* @param string
* @param array
* @param callback
* @return bool
*/
function apply_queries($query, $tables, $escape = 'table') {
foreach ($tables as $table) {
if (!queries("$query " . $escape($table))) {
return false;
}
}
return true;
}

/** Redirect by remembered queries
* @param string
* @param string
* @param bool
* @return bool
*/
function queries_redirect($location, $message, $redirect) {
return query_redirect(queries(), $location, $message, $redirect, false, !$redirect);
}

/** Remove parameter from query string
* @param string
* @return string
*/
function remove_from_uri($param = "") {
return substr(preg_replace("~(?<=[?&])($param" . (SID ? "" : "|" . session_name()) . ")=[^&]*&~", '', "$_SERVER[REQUEST_URI]&"), 0, -1);
}

/** Generate page number for pagination
* @param int
* @return string
*/
function pagination($page, $current) {
return " " . ($page == $current ? $page + 1 : '<a href="' . h(remove_from_uri("page") . ($page ? "&page=$page" : "")) . '">' . ($page + 1) . "</a>");
}

/** Get file contents from $_FILES
* @param string
* @param bool
* @return mixed int for error, string otherwise
*/
function get_file($key, $decompress = false) {
$file = $_FILES[$key];
if (!$file || $file["error"]) {
return $file["error"];
}
$return = file_get_contents($decompress && ereg('\\.gz$', $file["name"]) ? "compress.zlib://$file[tmp_name]"
: ($decompress && ereg('\\.bz2$', $file["name"]) ? "compress.bzip2://$file[tmp_name]"
: $file["tmp_name"]
)); //! may not be reachable because of open_basedir
if ($decompress) {
$start = substr($return, 0, 3);
if (function_exists("iconv") && ereg("^\xFE\xFF|^\xFF\xFE", $start, $regs)) { // not ternary operator to save memory
$return = iconv("utf-16", "utf-8", $return);
} elseif ($start == "\xEF\xBB\xBF") { // UTF-8 BOM
$return = substr($return, 3);
}
}
return $return;
}

/** Determine upload error
* @param int
* @return string
*/
function upload_error($error) {
$max_size = ($error == UPLOAD_ERR_INI_SIZE ? ini_get("upload_max_filesize") : 0); // post_max_size is checked in index.php
return ($error ? lang('Unable to upload a file.') . ($max_size ? " " . lang('Maximum allowed file size is %sB.', $max_size) : "") : lang('File does not exist.'));
}

/** Create repeat pattern for preg
* @param string
* @param int
* @return string
*/
function repeat_pattern($pattern, $length) {
// fix for Compilation failed: number too big in {} quantifier
return str_repeat("$pattern{0,65535}", $length / 65535) . "$pattern{0," . ($length % 65535) . "}"; // can create {0,0} which is OK
}

/** Check whether the string is in UTF-8
* @param string
* @return bool
*/
function is_utf8($val) {
// don't print control chars except \t\r\n
return (preg_match('~~u', $val) && !preg_match('~[\\0-\\x8\\xB\\xC\\xE-\\x1F]~', $val));
}

/** Shorten UTF-8 string
* @param string
* @param int
* @param string
* @return string escaped string with appended ...
*/
function shorten_utf8($string, $length = 80, $suffix = "") {
if (!preg_match("(^(" . repeat_pattern("[\t\r\n -\x{FFFF}]", $length) . ")($)?)u", $string, $match)) { // ~s causes trash in $match[2] under some PHP versions, (.|\n) is slow
preg_match("(^(" . repeat_pattern("[\t\r\n -~]", $length) . ")($)?)", $string, $match);
}
return h($match[1]) . $suffix . (isset($match[2]) ? "" : "<i>...</i>");
}

/** Generate friendly URL
* @param string
* @return string
*/
function friendly_url($val) {
// used for blobs and export
return preg_replace('~[^a-z0-9_]~i', '-', $val);
}

/** Print hidden fields
* @param array
* @param array
* @return null
*/
function hidden_fields($process, $ignore = array()) {
while (list($key, $val) = each($process)) {
if (is_array($val)) {
foreach ($val as $k => $v) {
$process[$key . "[$k]"] = $v;
}
} elseif (!in_array($key, $ignore)) {
echo '<input type="hidden" name="' . h($key) . '" value="' . h($val) . '">';
}
}
}

/** Print hidden fields for GET forms
* @return null
*/
function hidden_fields_get() {
echo (sid() ? '<input type="hidden" name="' . session_name() . '" value="' . h(session_id()) . '">' : '');
echo (SERVER !== null ? '<input type="hidden" name="' . DRIVER . '" value="' . h(SERVER) . '">' : "");
echo '<input type="hidden" name="username" value="' . h($_GET["username"]) . '">';
}

/** Find out foreign keys for each column
* @param string
* @return array array($col => array())
*/
function column_foreign_keys($table) {
global $adminer;
$return = array();
foreach ($adminer->foreignKeys($table) as $foreign_key) {
foreach ($foreign_key["source"] as $val) {
$return[$val][] = $foreign_key;
}
}
return $return;
}

/** Print enum input field
* @param string "radio"|"checkbox"
* @param string
* @param array
* @param mixed int|string|array
* @param string
* @return null
*/
function enum_input($type, $attrs, $field, $value, $empty = null) {
global $adminer;
preg_match_all("~'((?:[^']|'')*)'~", $field["length"], $matches);
$return = (isset($empty) ? "<label><input type='$type'$attrs value='$empty'" . ((is_array($value) ? in_array($empty, $value) : $value === 0) ? " checked" : "") . "><i>" . lang('empty') . "</i></label>" : "");
foreach ($matches[1] as $i => $val) {
$val = stripcslashes(str_replace("''", "'", $val));
$checked = (is_int($value) ? $value == $i+1 : (is_array($value) ? in_array($i+1, $value) : $value === $val));
$return .= " <label><input type='$type'$attrs value='" . ($i+1) . "'" . ($checked ? ' checked' : '') . '>' . h($adminer->editVal($val, $field)) . '</label>';
}
return $return;
}

/** Print edit input field
* @param array one field from fields()
* @param mixed
* @param string
* @return null
*/
function input($field, $value, $function) {
global $types, $adminer, $jush;
$name = h(bracket_escape($field["field"]));
echo "<td class='function'>";
$reset = ($jush == "mssql" && $field["auto_increment"]);
if ($reset && !$_POST["save"]) {
$function = null;
}
$functions = (isset($_GET["select"]) || $reset ? array("orig" => lang('original')) : array()) + $adminer->editFunctions($field);
$attrs = " name='fields[$name]'";
if ($field["type"] == "enum") {
echo nbsp($functions[""]) . "<td>" . $adminer->editInput($_GET["edit"], $field, $attrs, $value);
} else {
$first = 0;
foreach ($functions as $key => $val) {
if ($key === "" || !$val) {
break;
}
$first++;
}
$onchange = ($first ? " onchange=\"var f = this.form['function[" . h(js_escape(bracket_escape($field["field"]))) . "]']; if ($first > f.selectedIndex) f.selectedIndex = $first;\"" : "");
$attrs .= $onchange;
echo (count($functions) > 1 ? html_select("function[$name]", $functions, !isset($function) || in_array($function, $functions) || isset($functions[$function]) ? $function : "", "functionChange(this);") : nbsp(reset($functions))) . '<td>';
$input = $adminer->editInput($_GET["edit"], $field, $attrs, $value); // usage in call is without a table
if ($input != "") {
echo $input;
} elseif ($field["type"] == "set") { //! 64 bits
preg_match_all("~'((?:[^']|'')*)'~", $field["length"], $matches);
foreach ($matches[1] as $i => $val) {
$val = stripcslashes(str_replace("''", "'", $val));
$checked = (is_int($value) ? ($value >> $i) & 1 : in_array($val, explode(",", $value), true));
echo " <label><input type='checkbox' name='fields[$name][$i]' value='" . (1 << $i) . "'" . ($checked ? ' checked' : '') . "$onchange>" . h($adminer->editVal($val, $field)) . '</label>';
}
} elseif (ereg('blob|bytea|raw|file', $field["type"]) && ini_bool("file_uploads")) {
echo "<input type='file' name='fields-$name'$onchange>";
} elseif (ereg('text|lob', $field["type"])) {
echo "<textarea " . ($jush != "sqlite" || ereg("\n", $value) ? "cols='50' rows='12'" : "cols='30' rows='1' style='height: 1.2em;'") . "$attrs>" . h($value) . '</textarea>'; // 1.2em - line-height
} else {
// int(3) is only a display hint
$maxlength = (!ereg('int', $field["type"]) && preg_match('~^(\\d+)(,(\\d+))?$~', $field["length"], $match) ? ((ereg("binary", $field["type"]) ? 2 : 1) * $match[1] + ($match[3] ? 1 : 0) + ($match[2] && !$field["unsigned"] ? 1 : 0)) : ($types[$field["type"]] ? $types[$field["type"]] + ($field["unsigned"] ? 0 : 1) : 0));
echo "<input value='" . h($value) . "'" . ($maxlength ? " maxlength='$maxlength'" : "") . (ereg('char|binary', $field["type"]) && $maxlength > 20 ? " size='40'" : "") . "$attrs>";
}
}
}

/** Process edit input field
* @param one field from fields()
* @return string
*/
function process_input($field) {
global $adminer;
$idf = bracket_escape($field["field"]);
$function = $_POST["function"][$idf];
$value = $_POST["fields"][$idf];
if ($field["type"] == "enum") {
if ($value == -1) {
return false;
}
if ($value == "") {
return "NULL";
}
return +$value;
}
if ($field["auto_increment"] && $value == "") {
return null;
}
if ($function == "orig") {
return ($field["on_update"] == "CURRENT_TIMESTAMP" ? idf_escape($field["field"]) : false);
}
if ($function == "NULL") {
return "NULL";
}
if ($field["type"] == "set") {
return array_sum((array) $value);
}
if (ereg('blob|bytea|raw|file', $field["type"]) && ini_bool("file_uploads")) {
$file = get_file("fields-$idf");
if (!is_string($file)) {
return false; //! report errors
}
return q($file);
}
return $adminer->processInput($field, $value, $function);
}

/** Print results of search in all tables
* @uses $_GET["where"][0]
* @uses $_POST["tables"]
* @return null
*/
function search_tables() {
global $adminer, $connection;
$_GET["where"][0]["op"] = "LIKE %%";
$_GET["where"][0]["val"] = $_POST["query"];
$found = false;
foreach (table_status() as $table => $table_status) {
$name = $adminer->tableName($table_status);
if (isset($table_status["Engine"]) && $name != "" && (!$_POST["tables"] || in_array($table, $_POST["tables"]))) {
$result = $connection->query("SELECT" . limit("1 FROM " . table($table), " WHERE " . implode(" AND ", $adminer->selectSearchProcess(fields($table), array())), 1));
if ($result->fetch_row()) {
if (!$found) {
echo "<ul>\n";
$found = true;
}
echo "<li><a href='" . h(ME . "select=" . urlencode($table) . "&where[0][op]=" . urlencode($_GET["where"][0]["op"]) . "&where[0][val]=" . urlencode($_GET["where"][0]["val"])) . "'>$name</a>\n";
}
}
}
echo ($found ? "</ul>" : "<p class='message'>" . lang('No tables.')) . "\n";
}

/** Send headers for export
* @param string
* @param bool
* @return string extension
*/
function dump_headers($identifier, $multi_table = false) {
global $adminer;
$return = $adminer->dumpHeaders($identifier, $multi_table);
$output = $_POST["output"];
if ($output != "text") {
header("Content-Disposition: attachment; filename=" . friendly_url($identifier != "" ? $identifier : (SERVER != "" ? SERVER : "localhost")) . ".$return" . ($output != "file" && !ereg('[^0-9a-z]', $output) ? ".$output" : ""));
}
session_write_close();
return $return;
}

/** Print CSV row
* @param array
* @return null
*/
function dump_csv($row) {
foreach ($row as $key => $val) {
if (preg_match("~[\"\n,;\t]~", $val) || $val === "") {
$row[$key] = '"' . str_replace('"', '""', $val) . '"';
}
}
echo implode(($_POST["format"] == "csv" ? "," : ($_POST["format"] == "tsv" ? "\t" : ";")), $row) . "\r\n";
}

/** Apply SQL function
* @param string
* @param string escaped column identifier
* @return string
*/
function apply_sql_function($function, $column) {
return ($function ? ($function == "unixepoch" ? "DATETIME($column, '$function')" : ($function == "count distinct" ? "COUNT(DISTINCT " : strtoupper("$function(")) . "$column)") : $column);
}

/** Read password from file adminer.key in temporary directory or create one
* @return string or false if the file can not be created
*/
function password_file() {
$dir = ini_get("upload_tmp_dir"); // session_save_path() may contain other storage path
if (!$dir) {
if (function_exists('sys_get_temp_dir')) {
$dir = sys_get_temp_dir();
} else {
$filename = @tempnam("", ""); // @ - temp directory can be disabled by open_basedir
if (!$filename) {
return false;
}
$dir = dirname($filename);
unlink($filename);
}
}
$filename = "$dir/adminer.key";
$return = @file_get_contents($filename); // @ - can not exist
if ($return) {
return $return;
}
$fp = @fopen($filename, "w"); // @ - can have insufficient rights //! is not atomic
if ($fp) {
$return = md5(uniqid(mt_rand(), true));
fwrite($fp, $return);
fclose($fp);
}
return $return;
}

/** Check whether the string is e-mail address
* @param string
* @return bool
*/
function is_mail($email) {
$atom = '[-a-z0-9!#$%&\'*+/=?^_`{|}~]'; // characters of local-name
$domain = '[a-z0-9]([-a-z0-9]{0,61}[a-z0-9])'; // one domain component
$pattern = "$atom+(\\.$atom+)*@($domain?\\.)+$domain";
return preg_match("(^$pattern(,\\s*$pattern)*\$)i", $email);
}

/** Check whether the string is URL address
* @param string
* @return string "http", "https" or ""
*/
function is_url($string) {
$domain = '[a-z0-9]([-a-z0-9]{0,61}[a-z0-9])'; // one domain component //! IDN
return (preg_match("~^(https?)://($domain?\\.)+$domain(:\\d+)?(/.*)?(\\?.*)?(#.*)?\$~i", $string, $match) ? strtolower($match[1]) : ""); //! restrict path, query and fragment characters
}
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