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<?php
/**
* Parameter input functions.
* This file contains functions for getting input from get/post variables.
*
* @package Elgg
* @subpackage Core
* @author Curverider Ltd <info@elgg.com>
* @link http://elgg.org/
*/
/**
* Get some input from variables passed on the GET or POST line.
*
* @param $variable string The variable we want to return.
* @param $default mixed A default value for the variable if it is not found.
* @param $filter_result If true then the result is filtered for bad tags.
*/
function get_input($variable, $default = "", $filter_result = true)
{
global $CONFIG;
if (isset($CONFIG->input[$variable])) {
$var = $CONFIG->input[$variable];
if ($filter_result)
$var = filter_tags($var);
return $var;
}
if (isset($_REQUEST[$variable])) {
if (is_array($_REQUEST[$variable])) {
$var = $_REQUEST[$variable];
} else {
$var = trim($_REQUEST[$variable]);
}
if ($filter_result)
$var = filter_tags($var);
return $var;
}
return $default;
}
/**
* Sets an input value that may later be retrieved by get_input
*
* @param string $variable The name of the variable
* @param string $value The value of the variable
*/
function set_input($variable, $value) {
global $CONFIG;
if (!isset($CONFIG->input))
$CONFIG->input = array();
if (is_array($value))
{
foreach ($value as $key => $val)
$value[$key] = trim($val);
$CONFIG->input[trim($variable)] = $value;
}
else
$CONFIG->input[trim($variable)] = trim($value);
}
/**
* Filter tags from a given string based on registered hooks.
* @param $var
* @return mixed The filtered result
*/
function filter_tags($var)
{
return trigger_plugin_hook('validate', 'input', null, $var);
}
/**
* Sanitise file paths for input, ensuring that they begin and end with slashes etc.
*
* @param string $path The path
* @return string
*/
function sanitise_filepath($path)
{
// Convert to correct UNIX paths
$path = str_replace('\\', '/', $path);
// Sort trailing slash
$path = trim($path);
$path = rtrim($path, " /");
$path = $path . "/";
return $path;
}
/**
* Takes a string and turns any URLs into formatted links
*
* @param string $text The input string
* @return string The output stirng with formatted links
**/
function parse_urls($text) {
return preg_replace_callback('/(?<!=["\'])((ht|f)tps?:\/\/[^\s\r\n\t<>"\'\!\(\)]+)/i',
create_function(
'$matches',
'
$url = $matches[1];
$urltext = str_replace("/", "/<wbr />", $url);
return "<a href=\"$url\" style=\"text-decoration:underline;\">$urltext</a>";
'
), $text);
}
function autop($pee, $br = 1) {
$pee = $pee . "\n"; // just to make things a little easier, pad the end
$pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee);
// Space things out a little
$allblocks = '(?:table|thead|tfoot|caption|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|form|map|area|blockquote|address|math|style|input|p|h[1-6]|hr)';
$pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee);
$pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee);
$pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines
if ( strpos($pee, '<object') !== false ) {
$pee = preg_replace('|\s*<param([^>]*)>\s*|', "<param$1>", $pee); // no pee inside object/embed
$pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee);
}
$pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates
$pee = preg_replace('/\n?(.+?)(?:\n\s*\n|\z)/s', "<p>$1</p>\n", $pee); // make paragraphs, including one at the end
$pee = preg_replace('|<p>\s*?</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace
$pee = preg_replace('!<p>([^<]+)\s*?(</(?:div|address|form)[^>]*>)!', "<p>$1</p>$2", $pee);
$pee = preg_replace( '|<p>|', "$1<p>", $pee );
$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag
$pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem with nested lists
$pee = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee);
$pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee);
$pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee);
$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee);
if ($br) {
$pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', create_function('$matches', 'return str_replace("\n", "<WPPreserveNewline />", $matches[0]);'), $pee);
$pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee); // optionally make line breaks
$pee = str_replace('<WPPreserveNewline />', "\n", $pee);
}
$pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee);
$pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee);
if (strpos($pee, '<pre') !== false)
$pee = preg_replace_callback('!(<pre.*?>)(.*?)</pre>!is', 'clean_pre', $pee );
$pee = preg_replace( "|\n</p>$|", '</p>', $pee );
return $pee;
}
function input_init() {
if (ini_get_bool('magic_quotes_gpc') ) {
//do keys as well, cos array_map ignores them
function stripslashes_arraykeys($array) {
if (is_array($array)) {
$array2 = array();
foreach ($array as $key => $data) {
if ($key != stripslashes($key)) {
$array2[stripslashes($key)] = $data;
} else {
$array2[$key] = $data;
}
}
return $array2;
} else {
return $array;
}
}
function stripslashes_deep($value) {
if (is_array($value)) {
$value = stripslashes_arraykeys($value);
$value = array_map('stripslashes_deep', $value);
} else {
$value = stripslashes($value);
}
return $value;
}
$_POST = stripslashes_arraykeys($_POST);
$_GET = stripslashes_arraykeys($_GET);
$_COOKIE = stripslashes_arraykeys($_COOKIE);
$_REQUEST = stripslashes_arraykeys($_REQUEST);
$_POST = array_map('stripslashes_deep', $_POST);
$_GET = array_map('stripslashes_deep', $_GET);
$_COOKIE = array_map('stripslashes_deep', $_COOKIE);
$_REQUEST = array_map('stripslashes_deep', $_REQUEST);
if (!empty($_SERVER['REQUEST_URI'])) {
$_SERVER['REQUEST_URI'] = stripslashes($_SERVER['REQUEST_URI']);
}
if (!empty($_SERVER['QUERY_STRING'])) {
$_SERVER['QUERY_STRING'] = stripslashes($_SERVER['QUERY_STRING']);
}
if (!empty($_SERVER['HTTP_REFERER'])) {
$_SERVER['HTTP_REFERER'] = stripslashes($_SERVER['HTTP_REFERER']);
}
if (!empty($_SERVER['PATH_INFO'])) {
$_SERVER['PATH_INFO'] = stripslashes($_SERVER['PATH_INFO']);
}
if (!empty($_SERVER['PHP_SELF'])) {
$_SERVER['PHP_SELF'] = stripslashes($_SERVER['PHP_SELF']);
}
if (!empty($_SERVER['PATH_TRANSLATED'])) {
$_SERVER['PATH_TRANSLATED'] = stripslashes($_SERVER['PATH_TRANSLATED']);
}
}
}
register_elgg_event_handler('init','system','input_init');
?>
|
