<?php
$str = 'C:\dir\file.php';
$tips = split('\\\\', $str); print_r($tips);//Array ( [0] => C:\dir\file.php ) ?>
PD9waHAKJHN0ciA9ICdDOlxkaXJcZmlsZS5waHAnOwokdGlwcyA9IHNwbGl0KCdcXFxcJywgJHN0cik7CnByaW50X3IoJHRpcHMpOy8vQXJyYXkgKCBbMF0gPT4gQzpcZGlyXGZpbGUucGhwICkKPz4=