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@wildiney
Created June 1, 2013 00:26
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Sanitize database inputs
<?php
function cleanInput($input) {
$search = array(
'@<script[^>]*?>.*?</script>@si', // Strip out javascript
'@<[\/\!]*?[^<>]*?>@si', // Strip out HTML tags
'@<style[^>]*?>.*?</style>@siU', // Strip style tags properly
'@<![\s\S]*?--[ \t\n\r]*>@' // Strip multi-line comments
);
$output = preg_replace($search, '', $input);
return $output;
}
?>
<?php
function sanitize($input) {
if (is_array($input)) {
foreach($input as $var=>$val) {
$output[$var] = sanitize($val);
}
}
else {
if (get_magic_quotes_gpc()) {
$input = stripslashes($input);
}
$input = cleanInput($input);
$output = mysql_real_escape_string($input);
}
return $output;
}
?>
#Example of use
<?php
$bad_string = "Hi! <script src='http://www.evilsite.com/bad_script.js'></script> It's a good day!";
$good_string = sanitize($bad_string);
// $good_string returns "Hi! It\'s a good day!"
// Also use for getting POST/GET variables
$_POST = sanitize($_POST);
$_GET = sanitize($_GET);
?>
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