- var_dump: documentation ( source)
- basename: documentation ( source)
- preg_match: documentation ( source)
- random_bytes: documentation ( source)
<?php
$zzfile = random_bytes(101);
var_dump($zzfile);
$filename = basename($zzfile);
var_dump(preg_match('#\.(.+)$#', $filename, $matches));
var_dump($matches);