Strtolower function in php windows-1254 encoded

Question

I have a page and I have it,

<meta http-equiv="Content-Type" content="text/html; charset=windows-1254">

when i try to change the line with strtolower(). he does not work on "Ç, Ö, Ü, Ğ, Ş".

Example,
$str= "ÇaTPÖ";
$str = strtolower($str);
//$str = "ÇatpÖ";

Also I am trying to change them using ereg_replace(), but not working again.
$str = ereg_replace("Ç","ç",$str);
$str = ereg_replace("Ö","ö",$str);

so what do you think is the problem?

Answer 1

Try mb_strtolower():

$str = mb_strtolower($str, 'windows-1254');

http://www.php.net/manual/en/function.mb-strtolower.php

Answer 2

The built-in PHP manipulation functions are not multibyte.

Check out the mb_ * functions set .

Edit: Also note: the hedge is deprecated. Use preg instead.