src/Config.php
public function has($key)
    {
        if (array_key_exists($key, $this->settings)) {
            return true;
        }

        return $this->fallback instanceof Config
            ? $this->fallback->has($key)
            : false;
    }
public function has($key)
    {
        if (array_key_exists($key, $this->settings)) {
            return true;
        }

        return $this->fallback instanceof Config
            ? $this->fallback->has($key)
            : false;
    }
public function has ( $ key ) { if ( array_key_exists ( $ key , $ this -> settings ) ) { return true ; } return $ this -> fallback instanceof Config ? $ this -> fallback -> has ( $ key ) : false ; }
Check if an item exists by key.

@param string $key

@return bool
Check if an item exists by key .