XSS filtering function in PHP

Question

Does anyone know of a good function out there for filtering generic input from forms? Zend_Filter_input seems to require prior knowledge of the contents of the input and I\'

Answer 1

According to www.mcafeesecure.com General Solution for vulnerable to cross-site scripting (XSS) filter function can be:

function xss_cleaner($input_str) {
    $return_str = str_replace( array('<','>',"'",'"',')','('), array('<','>',''','"',')','('), $input_str );
    $return_str = str_ireplace( '%3Cscript', '', $return_str );
    return $return_str;
}