problem string special charset hextobin php

I have 1 hex string that I want to pass to a string, but I get strange characters, why?

$string = "52656C6F6A204E616D69209620534B4D4549209620416375E17469636F";
$productnamehex = hex2bin($string);

result:

Reloj Nami � SKMEI � Acu�tico

should show:

Reloj Nami – SKMEI – Acuático

poor with utf8_encode and utf8_decode but nothing seems to work.

PHP TESTER CODE:

<?php
$string = "52656C6F6A204E616D69209620534B4D4549209620416375E17469636F";
$productnamehex = hex2bin($string);
echo $productnamehex;

Solution

Your string is encoded with MS cp1252.

The function utf8_encode() is misleading in that it only partially translates it because it only works with ISO-8859-1, of which cp1252 is a superset that includes additional characters like em-dashes and en-dashes, as in your string.

To properly convert the string:

$hex = "52656C6F6A204E616D69209620534B4D4549209620416375E17469636F";
$cp1252 = hex2bin($hex);
$utf8 = mb_convert_encoding($cp1252, 'UTF-8', 'cp1252');

var_dump($hex, $cp1252, $utf8);

Output:

string(58) "52656C6F6A204E616D69209620534B4D4549209620416375E17469636F"
string(29) "Reloj Nami � SKMEI � Acu�tico"
string(34) "Reloj Nami – SKMEI – Acuático"