public function lock($lockType)
    {
        if (!$this->isOpened()) {
            return false;
        }

        if ($this->options["blocking"]) {
            return flock($this->handle, $lockType);
        } else {
            $tries = 0;
            do {
                if (flock($this->handle, $lockType | LOCK_NB)) {
                    return true;
                } else {
                    ++$tries;
                    usleep(self::LOCK_RETRY_WAIT);
                }
            } while ($tries < self::LOCK_MAX_TRIES);

            return false;
        }
    }
public function lock($lockType)
    {
        if (!$this->isOpened()) {
            return false;
        }

        if ($this->options["blocking"]) {
            return flock($this->handle, $lockType);
        } else {
            $tries = 0;
            do {
                if (flock($this->handle, $lockType | LOCK_NB)) {
                    return true;
                } else {
                    ++$tries;
                    usleep(self::LOCK_RETRY_WAIT);
                }
            } while ($tries < self::LOCK_MAX_TRIES);

            return false;
        }
    }
public function lock ( $ lockType ) { if ( ! $ this -> isOpened ( ) ) { return false ; } if ( $ this -> options [ "blocking" ] ) { return flock ( $ this -> handle , $ lockType ) ; } else { $ tries = 0 ; do { if ( flock ( $ this -> handle , $ lockType | LOCK_NB ) ) { return true ; } else { ++ $ tries ; usleep ( self :: LOCK_RETRY_WAIT ) ; } } while ( $ tries < self :: LOCK_MAX_TRIES ) ; return false ; } }
Obtains a file lock

@param int $lockType Lock type PHP constant
@return boolean true on successful lock, false otherwise
Obtains a file lock