Question

I have the following hex format in string variable:

$str = "0dae28";

I would like to send the above as hex value (e.g. 0x0dae28) via the socket interface using:

socket_write($spawn,$output,strlen($output));

Therefore, I am curious on what should I do to go from $str to $output so that $output is sent as hex formatted data.

Any input is much appreciated. Thank you!

Answer 1

Use PHP’s hex2bin() function:

Example #1 hex2bin() example

<?php
$hex = hex2bin("6578616d706c65206865782064617461");
var_dump($hex);
?>

The above example will output something similar to:

string(16) "example hex data"

Thus, in your case:

$output = hex2bin($str);