Replace unicode character

Question

I am trying to replace a certain character in a string with another. They are quite obscure latin characters. I want to replace character (hex) 259 with 4d9, so I tried th

Answer 1

A couple of possible suggestions. Firstly, remember that you need to assign the new value to $string, i.e.:

$string = str_replace("\x02\x59","\x04\xd9",$string);

Secondly, verify that your byte stream occurs in the $string. I mention this because your hex string begins with a low-byte, so you'll need to make sure your $string is not UTF8 encoded.