HongKilDong

$ bin/console  debug:container directory_namer

 // This service is a public alias for the service
 // Vich\UploaderBundle\Naming\SubdirDirectoryNamer

Information for Service "Vich\UploaderBundle\Naming\SubdirDirectoryNamer"
=========================================================================

 Directory namer wich can create subfolder depends on generated filename.

HongKilDong

<?php
    $matches = array();
    preg_match("/\w{1}:(\\[\w .]+)*:(\d+)/", "-> function_exists('shell_exec') D:\cygwin\home\admin\work\symfony\lib\command\sfFormatter.class.php:28", $matches);
    echo $matches[0];