View file sys/inc/functions/user_access.php

<?php

function user_access( $access, $u_id = null, $exit = false )
{
    if ( $u_id == null )
        global $user;
    else
        $user = get_user( $u_id );
    if ( !isset( $user['group_access'] ) || $user['group_access'] == null ) {
        if ( $exit !== false ) {
            header( 'Location: ' . $exit );
            exit;
        } else
            return false;
    }
    if ( $exit !== false ) {
        if ( db::count("SELECT COUNT(*) FROM `user_group_access` WHERE `id_group` = '$user[group_access]' AND `id_access` = '" . my_esc( $access ) . "'") == 0 ) {
            header( "Location: $exit" );
            exit;
        }
    } else
        return ( db::count("SELECT COUNT(*) FROM `user_group_access` WHERE `id_group` = '$user[group_access]' AND `id_access` = '" . my_esc( $access ) . "'") == 1 ? true : false );
}