roundcubemail/program/lib/Roundcube/rcube_session.php
public function register_gc_handler($func)
    {
        foreach ($this->gc_handlers as $handler) {
            if ($handler == $func) {
                return;
            }
        }

        $this->gc_handlers[] = $func;
    }
public function register_gc_handler($func)
    {
        foreach ($this->gc_handlers as $handler) {
            if ($handler == $func) {
                return;
            }
        }

        $this->gc_handlers[] = $func;
    }
public function register_gc_handler ( $ func ) { foreach ( $ this -> gc_handlers as $ handler ) { if ( $ handler == $ func ) { return ; } } $ this -> gc_handlers [ ] = $ func ; }
Register additional garbage collector functions

@param mixed Callback function
Register additional garbage collector functions