- str_replace: documentation ( source)
- explode: documentation ( source)
- array_keys: documentation ( source)
<?php $badwords = 'base64_decode+union+select';
foreach (array_keys($_GET) as $key){
foreach(explode('+',$badwords) as $badware){
$_GET[$key]=str_replace($badware, $empty_string,$_GET[$key]);
}
}