bin2hex()

bin2hex() — Convert binary data into hexadecimal representation.

Built-in function of PHP 8.5. The manual lists it as available in PHP 4, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.

What it does

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

Signature

bin2hex(string $string): string

Parameters

Return value

Returns the hexadecimal representation of the given string.

Example

A runnable snippet:

$hex = bin2hex('Hello world!'); var_dump($hex); var_dump(hex2bin($hex));

Output:

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

See also

hex2bin(), pack()

All PHP 8.5 built-in functions

Reference card built from the PHP manual page bin2hex() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.