html_entity_decode

hebrevc

[edit] Last updated: Fri, 14 Jun 2013

hex2bin

(PHP >= 5.4.0)

hex2bin — Decodes a hexadecimally encoded binary string

Descrição

string hex2bin ( string $data )

Decodes a hexadecimally encoded binary string.

Cuidado

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

Parâmetros

data: Hexadecimal representation of data.

Valor Retornado

Returns the binary representation of the given data ou FALSE em caso de falha.

Erros

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

Changelog

Versão	Descrição
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.

Exemplos

Exemplo #1 hex2bin() example


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

O exemplo acima irá imprimir algo similar à:

string(16) "example hex data"

Veja Também

bin2hex() - Converte um dado binário em representação hexadecimal
unpack() - Unpack data from binary string

html_entity_decode

hebrevc

[edit] Last updated: Fri, 14 Jun 2013

add a note User Contributed Notes hex2bin - [4 notes]

down

Anonymous ¶

1 year ago


The function hex2bin does not exist in PHP5.

You can use 'pack' instead :



$binary_string = pack("H*" , $hex_string);

down

Johnson ¶

5 months ago


For those who have php version prior to 5.4, i have a solution to convert hex to binary. It works for me in an encryption and decryption application.





<?php


        function hextobin($hexstr)


    {


        $n = strlen($hexstr);


        $sbin="";   


        $i=0;


        while($i<$n)


        {       


            $a =substr($hexstr,$i,2);           


            $c = pack("H*",$a);


            if ($i==0){$sbin=$c;}


            else {$sbin.=$c;}


            $i+=2;


        }


        return $sbin;


    }


?>

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jarismar dot php at gmail dot com ¶

6 months ago


A way to convert hex strings in the form "0x123ABC" to integer is to use the function base_convert("0x123ABC", 16, 10)

down

Anonymous ¶

1 year ago


The function pack("H*" , $hex_string); will not work as expected if $hex_string contains an odd number of hexadecimal digits.





For example:





<?php echo ord(pack("H*", 'F')); ?>





will return 240 not 15. Use pack("H*", '0F'); instead.

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