bin2hex

(PHP 4, PHP 5)

bin2hexПреобразует бинарные данные в шестнадцатиричное представление

Описание

string bin2hex ( string $str )

Возвращает ASCII-строку, содержащую шестнадцатиричное представление аргумента str. Преобразование производится побайтно, начиная с верхнего полубайта.

Список параметров

str

Строка.

Возвращаемые значения

Возвращает шестнадцатиричное представление указанной строки.

Смотрите также

  • hex2bin() - Преобразует шестнадцатеричные данные в двоичные
  • pack() - Упаковывает данные в бинарную строку

Коментарии

In an attempt to dodge spam bots I've seen people (including myself) hex encode their email addresses in "mailto" tags. This is the small chunk of code I wrote to automate the process:

<?php
function hex_encode ($email_address)    {
       
$encoded bin2hex("$email_address");
       
$encoded chunk_split($encoded2'%');
       
$encoded '%' substr($encoded0strlen($encoded) - 1);
        return 
$encoded;   
}
?>

so for example:
<a href="mailto:&lt;?=hex_encode("pedram@redhive.com")?>">email me</a>

would produce the following address:
%70%65%64%72%61%6d%40%72%65%64%68%69%76%65%2e%63%6f%6d

-pedram
2001-01-31 19:21:42
http://php5.kiev.ua/manual/ru/function.bin2hex.html
I was just browsing the above and with a little modification,
came up with the following which I believe to be more flexible:

<?php
function bin2hex($data) {
   
$corrected ereg_replace("[^0-9a-fA-F]","",$data);
    return 
pack("H".strlen($corrected),$corrected);
}
?>

This will make sure that whatever you pass, even if it is padded
at the extremeties or between pairs, should return the desired data.
2001-08-25 23:05:46
http://php5.kiev.ua/manual/ru/function.bin2hex.html
Hopefully this helps someone...

It just displays an html representation of hex data, much like a hex viewer would.

Matt

<?php
function hexview($data){
 
$bytePosition $columnCount $lineCount 0;
 
$columns 8;
 
$dataLength strlen($data);
 
$return = array();
 
$return[] = '<table border="1" cellspacing="0" cellpadding="2">';
  for(
$n 0$n $dataLength$n++){
   
$lines[$lineCount][$columnCount++] = substr($data$n1);
    if(
$columnCount == $columns){
     
$lineCount++;
     
$columnCount 0;
    }
  }
  foreach(
$lines as $line){
   
$return[] = '<tr><td align="right">'.$bytePosition.': </td>';
    for(
$n 0$n $columns$n++){
     
$return[] = '<td>'.strtoupper(bin2hex($line[$n])).'</td>';
    }
   
$return[] = '<td> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </td>';
    for(
$n 0$n $columns$n++){
     
$return[] = '<td>'.(htmlentities($line[$n]) ? htmlentities($line[$n]) : '&nbsp;').'</td>';
    }
   
$return[] = '</tr>';
   
$bytePosition $bytePosition $columns;
  }
 
$return[] = '</table>';
  return 
implode(''$return);
}
?>
2002-08-21 05:27:21
http://php5.kiev.ua/manual/ru/function.bin2hex.html
This function undoes it (converts back into ASCII).

<?php
function hex2asc($myin) {
for (
$i=0$i<strlen($myin)/2$i++) {
$myout.=chr(base_convert(substr($myin,$i*2,2),16,10));
}
return 
$myout;
}
?>
2002-10-09 01:00:24
http://php5.kiev.ua/manual/ru/function.bin2hex.html
Some gave a function to convert a hex code back into a simple text (human readable ASCII :P)

Some else gave a function that makes use of bin2hex to convert URLs into something like %12%34%56

Here is a function to go from the form %12%34%56 back into ASCII

Note that this function can easily be changed in order to transform any hex code into ASCII

<?
function _hex2text($str) {
   
$str explode('%'$str);
   
array_shift($str);
   
$nmlstr '';
    foreach(
$str as $hexstr) {
     
$nmlstr .= chr(base_convert($hexstr1610));
    }   
    return 
$nmlstr;
}
?>

'hope this helps :)
Regards
-Tsuna
2003-01-16 15:04:51
http://php5.kiev.ua/manual/ru/function.bin2hex.html
function to search a character in a normal string change this for a hexadecimal and take the especifical char code in hexa and replace this char and return the string 

<?php
function hex_replace($pCaracter,$sCaracter,$conteudo) {
   
   
$pHex bin2hex($pCaracter);
   
$sHex bin2hex($sCaracter);
       
   
$tam strlen($conteudo);   
       
    for(
$i 0$i <= $tam$i++) {
       
$cont bin2hex(substr($conteudo,$i,1));
   
        if (
$cont == $pHex) {
           
$cont $sHex;
           
$hex .= $cont;
        }
    }
       
    for (
$i=0;$i<strlen($hex);$i+=2)
         
$bin .= chr(hexdec(substr($hex,$i,2)));
    return 
$bin;
}
?>

by from a litle brazilian. :-P
2003-07-21 19:33:11
http://php5.kiev.ua/manual/ru/function.bin2hex.html
Автор:
I thought it'll give me an "F" if i give it a "1111"...

Here's something to convert a binary-string into a hex-string and other direction too:

<?php
function hexbin($hex) {
   
$bin decbin(hexdec($hex));
    return 
$bin;
}

function 
binhex($bin) {
   
$hex dechex(bindec($bin));
    return 
$hex;
}
?>

simple, isn't it?
2003-10-24 08:24:43
http://php5.kiev.ua/manual/ru/function.bin2hex.html
Ok, this is a better version than my previous poor example.

Running this in shell creates a progress indicator. Very useful if used when parsing large log files for instance.

#!/usr/bin/php4 -q
<?
// Displays a progress indicator
function progress($line)
{
        global 
$last_len;

       
$del_char pack("H" 2"7F");
       
$line_len strlen($line);
       
$del_chars=(isset($last_len)) ? $last_len $line_len;

       
$last_len $line_len;
        return 
str_repeat($del_char, ($del_chars)).$line;
}

// demo code:
for($i=0;$i<100;$i++)
{
       
sleep(1);
        echo 
progress("i is now: $i out of 100");
}
?>
2003-10-29 07:34:45
http://php5.kiev.ua/manual/ru/function.bin2hex.html
Автор:
I needed a little function that will print the binary as a string, here it comes.

<?php
function bin2string($bin) {
   
$res "";
    for(
$p=31$p >= 0$p--) {
     
$res .= ($bin & (<< $p)) ? "1" "0";
    }
    return 
$res;
}
?>
2004-02-01 11:14:55
http://php5.kiev.ua/manual/ru/function.bin2hex.html
In response to Patrik:
A simpler way to print a number in binary is to use base_convert().
<? echo base_convert($bin102); ?>
If you need it to print all 32 bits (as your function does) you can just pad it out:
<? echo str_pad(base_convert($bin102), 32'0'STR_PAD_LEFT); ?>
The conversion is from base 10 because when $bin is passed to base_convert(), it is converted to a string, and the default representation is in decimal.
Hope this helps.
2004-04-20 02:34:31
http://php5.kiev.ua/manual/ru/function.bin2hex.html
My version of quoted-printable mail subject converting function (maybe not as effective, but preserving characters which don't need conversion).
Martin
<?php
// Transfer mail subject into Quoted Printable encoding
function mail_quote_subj($str$charset){
   
$out '';
    for(
$i 0$i strlen($str); $i++){
       
$out .= (ord($str[$i]) > 127) ? "=" bin2hex($str[$i]) : $str[$i];
    }
    return 
"=?$charset?Q?".$out."?=";
};
?>
2004-04-23 10:14:35
http://php5.kiev.ua/manual/ru/function.bin2hex.html
Here's a modified version of an earlier post (asc2bin and bin2asc) to convert an incoming ascii string to hex and out again.  For example, this is really useful if you want to insert data into a mySQL database which contains both escaped and non-escaped characters.  For example, if you want to store code snibbets in a mySQL text field:

printf("here's some \"text\".");

If you INSERT this into mySQL, it probably won't come out in friendly executable format, and you can't escape all double-quotes, nor can you strip out all the slashes.  One solution is to just convert the string to hex, store it in hex, then convert back to ascii before using it in some way:

function asc2hex ($temp) {
   $len = strlen($temp);
   for ($i=0; $i<$len; $i++) $data.=sprintf("%02x",ord(substr($temp,$i,1)));
   return $data;
}

function hex2asc($temp) {
   $len = strlen($temp);
   for ($i=0;$i<$len;$i+=2) $data.=chr(hexdec(substr($temp,$i,2)));
   return $data;
}
2004-08-19 18:05:07
http://php5.kiev.ua/manual/ru/function.bin2hex.html
modified version of Thoth's hexbin and binhex to convert 
any size numbers 
(original doesn't take more than integer - 32bit)
<?
function hexbin($hex){
   
$bin='';
    for(
$i=0;$i<strlen($hex);$i++)
       
$bin.=str_pad(decbin(hexdec($hex{$i})),4,'0',STR_PAD_LEFT);
       return 
$bin;


function 
binhex($bin){
   
$hex='';
    for(
$i=strlen($bin)-4;$i>=0;$i-=4)
       
$hex.=dechex(bindec(substr($bin,$i,4)));
   return 
strrev($hex);
}
?>
2004-11-22 10:18:50
http://php5.kiev.ua/manual/ru/function.bin2hex.html
A good option for creating strings with binary data for saving (for example saving an sql statement to a file) into text files or php code is to do the following:

<?php
$field
=bin2hex($field);
$field=chunk_split($field,2,"\\x");
$field"\\x" substr($field,0,-2);
?>

this will convert your field (binary or not) into hex and then convert the hex into a string which may be placed in a php file:

FFFFFFFF -> \xFF\xFF\xFF\xFF
2004-11-24 07:11:34
http://php5.kiev.ua/manual/ru/function.bin2hex.html
This function returns the string $str in htmlentity hex format (&#xnumber;).
It is useful to prevent spam bots indexing your email adress.

<?php

function hexentities($str) {
   
$return '';
    for(
$i 0$i strlen($str); $i++) {
       
$return .= '&#x'.bin2hex(substr($str$i1)).';';
    }
    return 
$return;
}

?>

example:
<?php echo 'email: <address>'.hexentities('foo@bar').'</address>'?>
will return: 

email: <address>&#x66;&#x6f;&#x6f;&#x40;&#x62;&#x61;&#x72;</address>

the browser will show foo@bar.
2005-01-09 15:30:13
http://php5.kiev.ua/manual/ru/function.bin2hex.html
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.
2007-08-12 02:35:04
http://php5.kiev.ua/manual/ru/function.bin2hex.html
hex2bin can be useful to insert data into BLOB binary fields.

for example if you want to insert the content of a file :

<?php
$filename 
'/foo/bar';
$bin_content fread(fopen($filename,"r"),filesize($filename));

// use the usual mysql_connect() function

$insert_query "INSERT INTO mytable (blob_field) VALUES ('".bin2hex($bin_content)."')";
mysql_query($insert_query);

?>
2007-11-26 04:37:57
http://php5.kiev.ua/manual/ru/function.bin2hex.html
The most simple way to do binary (10101010 or so) to hex is
<?PHP echo dechex(bindec(10101010)); ?>
2008-08-15 20:08:23
http://php5.kiev.ua/manual/ru/function.bin2hex.html
Автор:
Because the way back (hex2bin) doesn't exist on php, i've written another little function without using commands like pack:

<?php
// Convert a hex-string to binary-string (the way back from bin2hex)

function hex2bin($h)
  {
  if (!
is_string($h)) return null;
 
$r='';
  for (
$a=0$a<strlen($h); $a+=2) { $r.=chr(hexdec($h{$a}.$h{($a+1)})); }
  return 
$r;
  }

echo 
bin2hex('Hello'); // result: 48656c6c6f
echo hex2bin('48656c6c6f'); // result: Hello
?>
2008-10-03 23:30:59
http://php5.kiev.ua/manual/ru/function.bin2hex.html
Regarding the fabled hex2bin, the easiest way I've found to "replace" it is the following call to function pack():

<?php
$bin_str 
pack("H*" $hex_str);   
?>
2009-09-03 09:05:05
http://php5.kiev.ua/manual/ru/function.bin2hex.html
Here's a function to check if a string contains any 7-bit GSM characters.

It might come useful for people working on SMS platforms.

<?php
 
function check_gsm($str)
{
   
$arr = array(
"0x00""0x01""0x02""0x03""0x04""0x05","0x06","0x07","0x08","0x09",
"0x0A","0x0B","0x0C","0x0D","0x0E","0x0F","0x10","0x11","0x12","0x13",
"0x14","0x15","0x16","0x17","0x18","0x19","0x1A","0x1B","0x1B0A",
"0x1B14","0x1B28","0x1B29","0x1B2F","0x1B3C","0x1B3D","0x1B3E",
"0x1B40","0x1B65","0x1C","0x1D","0x1E","0x1F","0x20","0x21","0x22",
"0x23","0x24","0x25","0x26","0x27","0x28","0x29","0x2A","0x2B","0x2C",
"0x2D","0x2E","0x2F","0x30","0x31","0x32","0x33","0x34","0x35","0x36",
"0x37","0x38","0x39","0x3A","0x3B","0x3C","0x3D","0x3E","0x3F","0x40",
"0x41","0x42","0x43","0x44","0x45","0x46","0x47","0x48","0x49","0x4A",
"0x4B","0x4C","0x4D","0x4E","0x4F","0x50","0x51","0x52","0x53","0x54",
"0x55","0x56","0x57","0x58","0x59","0x5A","0x5B","0x5C","0x5D","0x5E",
"0x5F","0x60","0x61","0x62","0x63","0x64","0x65","0x66","0x67","0x68",
"0x69","0x6A","0x6B","0x6C","0x6D","0x6E","0x6F","0x70","0x71","0x72",
"0x73","0x74","0x75","0x76","0x77","0x78","0x79","0x7A","0x7B","0x7C",
"0x7D","0x7E","0x7F");
 
   
$strl strlen($str);
    for (
$i 0;$i $strl$i++)
    {
       
$char '0x' bin2hex(substr($str,$i,1));
       
$pos in_array($char,$arr);
        if (
$pos == 1)
        {
           
$j++;
        }
    }
 
    if (
$j $strl)
    {
        return 
false;
    }
    else
    {
        return 
true;
    }
}
?>
2009-09-18 08:19:04
http://php5.kiev.ua/manual/ru/function.bin2hex.html
Автор:
Postgresql return result in bytea so don't forget to convert_from

<?php
$sql 
"SELECT convert_from(decode('"bin2hex('hex encoded string') ."', 'hex'),'UTF8')";
?>
2014-10-13 16:32:41
http://php5.kiev.ua/manual/ru/function.bin2hex.html

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