html_entity_decode

hebrevc

[edit] Last updated: Tue, 21 May 2013

hex2bin

(PHP >= 5.4.0)

hex2bin — Decodes a hexadecimally encoded binary string

Descrizione

string hex2bin ( string $data )

Decodes a hexadecimally encoded binary string.

Attenzione

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

Elenco dei parametri

data: Hexadecimal representation of data.

Valori restituiti

Returns the binary representation of the given data o FALSE in caso di fallimento.

Errori/Eccezioni

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

Log delle modifiche

Versione	Descrizione
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.

Esempi

Example #1 hex2bin() example


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

Il precedente esempio visualizzerà qualcosa simile a:

string(16) "example hex data"

Vedere anche:

bin2hex() - Converte i dati binari nella rappresentazione esadecimale
unpack() - Unpack data from binary string

html_entity_decode

hebrevc

[edit] Last updated: Tue, 21 May 2013

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

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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 ¶

4 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 ¶

5 months ago


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

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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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