Odstranění diakritiky z textu

<?php

    $text = strip_tags(html_entity_decode($_POST["_text"]));
    $text  = iconv("UTF-8","windows-1250"."//TRANSLIT",$text);

    $a ="\xc1\xc9\xcd\xd3\xda\xdd\xe1\xe9\xed\xf3\xfa\xfd\xc2\xca\xce\xd4\xdb\xe2\xea\xee\xf4\xfb\xc0\xc8\xcc\xd2\xd9\xe0\xe8\xec\xf2\xf9\xc4\xcb\xcf\xd6\xdc\xe4\xeb\xef\xf6\xfc\xc3\xe3\xd5\xf5\xc5\xe5\xd1\xf1\xc7\xe7\xba\xaa\x8e\x9e\x9d\x8d\xd8\xf8\x8a\x9a";
    $b = 'AEIOUYaeiouyAEIOUaeiouACENUrcenuAEIOUaedouAaOoLlNnCcsSZztTRrSs';
    $text  = strtr($text , $a, $b); 

    echo $text;


    echo "<form action=\"http://vytvorweb.czweb.org/php/php-odstraneni-diakritiky.html\" method=\"post\">";   
    echo "text s diakritikou:";echo "<br />";
    echo "<textarea name=\"_text\" rows=\"6\" cols=\"55\">Zpráva...</textarea>";
    echo "<br />";
    echo "<br />";   
    echo "<input type=\"submit\" value=\"Poslat\" />
    </form>"; 
?>

<?php

    $text = $_POST["_text"]);
    $a    = "ÁÄČÇĎÉĚËÍŇÓÖŘŠŤÚŮÜÝŽáäčçďéěëíňóöřšťúůüýž";
    $b    = "AACCDEEEINOORSTUUUYZaaccdeeeinoorstuuuyz";
    echo(StrTr($text, $a, $b));


    echo "<form action=\"http://vytvorweb.czweb.org/php/php_odstraneni_diakritiky.html\" method=\"post\">";   

    echo "text s diakritikou:";echo "<br />";
    echo "<textarea name=\"_text\" rows=\"6\" cols=\"55\">Zpráva...</textarea>";
    echo "<br />";
    echo "<br />";   
    echo "<input type=\"submit\" value=\"Poslat\" />
    </form>";
    
?>