PHP recursive directory path with RecursiveIteratorIterator in combination with RecursiveDirectoryIterator

recursiveDirSearch.php

$path = realpath('/path/you/want/to/search/in');

$objects = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path), RecursiveIteratorIterator::SELF_FIRST);

foreach($objects as $name => $object){
    if($object->getFilename() === 'work.txt') {
        echo $object->getPathname();
    }
}