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PHP bin2hex() Function

Complete PHP String Reference

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.

Syntax

bin2hex(string)

Parameter	Description
string	Required. The string to be converted

Example

In this example we will convert a string value from binary to hex and back:

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

The output of the code above will be:

48656c6c6f20776f726c6421
Hello world!