Get your own PHP server Result Size: 625 x 565
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<!DOCTYPE html>
<html>
<body>
<?php
$str = "Hello world!";
echo bin2hex($str) . "<br>";
echo pack("H*",bin2hex($str)) . "<br>";
?> 
 
</body>
<!-- /php/phptryit.asp?filename=tryphp_func_string_bin2hex2 Thu, 06 Feb 2025 19:27:06 GMT -->
</html>
48656c6c6f20776f726c6421
Hello world!