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<?php
/**
* Sanitizes variables and arrays in a recursive manner
*
* This method was created as a result of strip_tags() happening on an array
* would destroy the contents of the array. Thus, in order to avoid this from
* happening we need checks to see if something is an array and to process
* it as such.
*
* The only sanitizing this method provides is stripping non-allowed tags.
*
* @author Christopher Weldon <cweldon@tamu.edu>
* @param mixed $value Value to be sanitized
* @return mixed
*/
function recursiveSanitize($value) {
if (is_array($value)) {
$valmod = array();
foreach ($value as $key => $subval) {
if (is_array($subval)) {
$subval = recursiveSanitize($subval);
} else {
$subval = strip_tags($subval);
}
$valmod[$key] = $subval;
}
$value = $valmod;
} else {
$value = strip_tags($value);
}
return $value;
}
if (!isset($_SERVER) && isset($HTTP_SERVER_VARS)) {
$_SERVER = &$HTTP_SERVER_VARS;
}
foreach ($_REQUEST as $key=>$val){
switch ($key){
case 'event_data':
# modify this to allow or disallow different HTML tags in event popups
$allowed = "<p><br><b><i><em><a><img><div><span><ul><ol><li><h1><h2><h3><h4><h5><h6><hr><em><strong><small><table><tr><td><th>";
$val = strip_tags($val,$allowed);
break;
default:
# cpath
$val = recursiveSanitize($val);
}
$_REQUEST[$key] = $val;
}
foreach ($_POST as $key=>$val){
switch ($key){
case 'action':
$actions = array('login','logout','addupdate','delete');
if (!in_array($val,$actions)) $val = '';
break;
case 'date':
case 'time':
if (!is_numeric($val)) $val = '';
break;
default:
$val = recursiveSanitize($val);
}
$_POST[$key] = $val;
}
foreach ($_GET as $key=>$val){
switch ($key){
case 'cal':
if (!is_array($val)){
$val = strip_tags($val);
$_GET['cal'] = strip_tags($val);
}else{
unset ($_GET['cal']);
foreach($val as $cal){
$_GET['cal'][]= strip_tags($cal);
}
}
break;
case 'getdate':
if (!is_numeric($val)) $val = '';
break;
default:
$val = recursiveSanitize($val);
}
if ($key != 'cal') $_GET[$key] = $val;
}
foreach ($_COOKIE as $key=>$val){
switch ($key){
case 'time':
if (!is_numeric($val)) $val = '';
break;
default:
$val = recursiveSanitize($val);
}
$_COOKIE[$key] = $val;
}
?>
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