- substr_count: documentation ( source)
- var_dump: documentation ( source)
- str_repeat: documentation ( source)
- str_replace: documentation ( source)
<?php
$a = 'a/b/c';
$c = substr_count($a, '/');
$d = ('[' . str_replace('/', ':[', $a) .':['.str_repeat(']', $c+2));
var_dump($d);