- mb_strpos: documentation ( source)
- var_dump: documentation ( source)
- str_replace: documentation ( source)
- mb_strtolower: documentation ( source)
<?php
$filename= "1404985656_2014-07-08_12_00__vikerraadio__vikerraadio-uudised__elistvere_loomapark_ootab_öiseid_külastajaid";
var_dump(mb_strpos('ö',mb_strtolower($filename)));
$filename = str_replace($replace, $with , mb_strtolower($filename));
var_dump($filename);