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bin2hex

tehjosh at gamingg dot net
11-Aug-2007 11:35


This function is for converting binary data into a hexadecimal string representation.  This function is not for converting strings representing binary digits into hexadecimal.  If you want that functionality, you can simply do this:



<?php

$binary = "11111001";

$hex = dechex(bindec($binary));

echo $hex;

?>



This would output "f9".  Just remember that there is a very big difference between binary data and a string representation of binary.

ratfactor at gmail dot com
23-Nov-2006 12:13


I also wished to have the ability to translate a string containing a binary number ('1101') to a string containing a hexadecimal number ('d').  Here is my function:



function strbin2hex($bin){

  $last = strlen($bin)-1;

  for($i=0; $i<=$last; $i++){ $x += $bin[$last-$i] * pow(2,$i); }

  return dechex($x);

}



Example:

strbin2hex('1101');   // returns 'd'



I also added some optional features to my function (zero padding and upper case hex letters):



function strbin2hex($bin, $pad=false, $upper=false){

  $last = strlen($bin)-1;

  for($i=0; $i<=$last; $i++){ $x += $bin[$last-$i] * pow(2,$i); }

  $x = dechex($x);

  if($pad){ while(strlen($x) < intval(strlen($bin))/4){ $x = "0$x"; } }

  if($upper){ $x = strtoupper($x); }

  return $x;

}



Examples:

strbin2hex('11110101', true, true);   // returns 'F5'

strbin2hex('00001011', true, true);   // returns '0B'

nilzie at gmail dot com
14-Jul-2006 06:12


Since PHP only has a way to convert a real binary string into hex, couldn't I find a function that can convert binary information written in ascii (like 0110). This function will convert that



<?

function asciibin2hex($str) {



$str = str_replace(" ", "", $str); //delete some probably spaces



//Binary to HEX list



$binary['0000'] = "0";

$binary['0001'] = "1";

$binary['0010'] = "2";

$binary['0011'] = "3";

$binary['0100'] = "4";

$binary['0101'] = "5";

$binary['0110'] = "6";

$binary['0111'] = "7";

$binary['1000'] = "8";

$binary['1001'] = "9";

$binary['1010'] = "a";

$binary['1011'] = "b";

$binary['1100'] = "c";

$binary['1101'] = "d";

$binary['1110'] = "e";

$binary['1111'] = "f";



//make sets of 4

for( ; ; ) {

$calc = strlen($str) / 4;

if(is_numeric($calc)&&(intval($calc)==floatval($calc))) {

    break;

    }

    else {

        $str .= 0;

        }

 }



//translate binary to hex

for($i = 0 ; $i < strlen($str) ; $i = $i + 4) {

        $set = substr($str, $i, 4);

        $inhex .= $binary[$set];

}



return $inhex;



}

//Examples:

echo asciibin2hex("101101011100"); //prints: b5c

echo asciibin2hex("1011 1000 1111 1100") //prints: b8fc

echo asciibin2hex("1000 1011 1101 001") //prints: 8bd2

?>



I hope I didn't make it too hard for myself writing this all, but h

bin2hex

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