<?php
 
// create lock object
$lock = new \Dorantor\FileLock('path/to/file');

// ..and work with it
if ($lock->acquire()) {
    // file is locked
    $lock->release();
}
 
// ..or it could be
if (!$lock->acquire()) {
    // failed with lock
    return;
}
// file was locked
$lock->release();