PEAK XOOPS - anti-XSS system (2)

<?php
function bigumbrella_init() {
        foreach( $_REQUEST as $key => $val ) {
                if( preg_match( '/[<\'"].{15}/s' , $val , $regs ) ) {
                        $GLOBALS['bigumbrella_doubtfuls'][] = $regs[0] ;
                }
        }
        if( ! empty( $GLOBALS['bigumbrella_doubtfuls'] ) ) {
                ob_start( 'bigumbrella_outputcheck' ) ;
        }
}

function bigumbrella_outputcheck( $s ) {
        if( ! is_array( @$GLOBALS['bigumbrella_doubtfuls'] ) ) {
                return "bigumbrella injection found." ;
        }

        foreach( $GLOBALS['bigumbrella_doubtfuls'] as $doubtful ) {
                if( strstr( $s , $doubtful ) ) {
                        return "XSS found." ;
                }
        }
        return $s ;
}

$GLOBALS['bigumbrella_doubtfuls'] = array() ;
bigumbrella_init() ;
?>

php_value auto_prepend_file /usr/local/lib/php/bigumbrella.php

auto_prepend_file = /usr/local/lib/php/bigumbrella.php