bin2hex

(PHP 4, PHP 5, PHP 7, PHP 8)

bin2hex — Convert binary data into hexadecimal representation

bin2hex(string $string): string

Returns an ASCII string containing the hexadecimal representation of string. The conversion is done byte-wise with the high-nibble first.

Returns the hexadecimal representation of the given string.

Example #1 bin2hex() example

<?php

$hex = bin2hex('Hello world!');

var_dump($hex);
var_dump(hex2bin($hex));
?>

The above example will output:

string(24) "48656c6c6f20776f726c6421"
string(12) "Hello world!"