PHP bin2hex() Function

Convert "Hello World!" to hexadecimal values:

<?php
$str = bin2hex("Hello World!");
echo($str);
?>

Definition and Usage

The bin2hex() function converts a string of ASCII characters to hexadecimal values. The string can be converted back using the pack() function.

bin2hex( string)

Parameter	Description
string	Required. The string to be converted

Return Value:	Returns the hexadecimal value of the converted string
PHP Version:	4+

Convert a string value from binary to hex and back:

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