Convert or Change Numbers into Letter ASCII in PHP with bin2hex() Function

If you want to conver a number into letter or a string, then you've found the right article.

I wanted to do this for a project and it took me a while to find the answer. Hopefully you can benefit from this:

First, copy and past the following code to a text editor like notepad.exe

<?php
$str = "Hello world!";
echo bin2hex($str) . "<br />";
echo pack("H*",bin2hex($str)) . "<br />";
?>

Save it and upload to your server, the call it with your browser, the following will be generated:

48656c6c6f20776f726c6421
Hello world!