แปลง hex to char ไม่ได้ครับลองค้นมาหลายวันแล้ว รบกวนผู้รู้ครับ

<?php
@header("Content-type: text/html; charset=utf-8");
function hexToStr($hex){
    $string='';
    for ($i=0; $i < strlen($hex)-1; $i+=2){
        $string .= chr(hexdec($hex[$i].$hex[$i+1]));
    }
    return $string;
}
function strToHex($string){
    $hex='';
    for ($i=0; $i < strlen($string); $i++){
        $hex .= dechex(ord($string[$i]));
    }
    return $hex;
}

$word = '%e0%b8%a7%e0%b8%b4%e0%b9%88%e0%b8%87%e0%b9%80%e0%b8%9e%e0%b8%b7%e0%b9%88%e0%b8%ad%e0%b8%aa%e0%b8%b8%e0%b8%82%e0%b8%a0%e0%b8%b2%e0%b8%9e-%e0%b9%84%e0%b8%a1%e0%b9%88%e0%b8%95%e0%b9%89%e0%b8%ad%e0%b8%87';
$string = str_replace('%','',$word);
echo iconv('UTF-8','UTF-8',hexToStr($string));

?>