AppserverIo\Appserver\Core\Utilities\Runlevels::isRunlevel PHP Method

Query whether or not, the passed runlevel is valid.

public isRunlevel ( string $runlevel ) : boolean
$runlevel	string	The runlevel to query
return	boolean	TRUE if the runlevel is valid, else FALSE

    public function isRunlevel($runlevel)
    {
        return isset($this->runlevels[$runlevel]);
    }

Runlevels