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hex2bin

(PHP >= 5.4.0)

hex2binDecodes a hexadecimally encoded binary string

Description

string hex2bin ( string $data )

Decodes a hexadecimally encoded binary string.

Caution

This function does NOT convert a hexadecimal number to a binary number. This can be done using the base_convert() function.

Parameters

data

Hexadecimal representation of data.

Return Values

Returns the binary representation of the given data or FALSE on failure.

Errors/Exceptions

If the hexadecimal input string is of odd length or invalid hexadecimal string an E_WARNING level error is thrown.

Changelog

Version Description
5.5.1 A warning is thrown if the input string is invalid hexadecimal string.
5.4.1 A warning is thrown if the input string is of odd length. In PHP 5.4.0 the string was silently accepted, but the last byte was truncated.

Examples

Example #1 hex2bin() example

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

The above example will output something similar to:

string(16) "example hex data"

See Also

  • bin2hex() - Convert binary data into hexadecimal representation
  • unpack() - Unpack data from binary string

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