How can I get a hex dump of a string in PHP?

How can I get a hex dump of a string in PHP?

I'm investigating encodings in PHP5. Is there some way to get a raw hex dump of a string? i.e. a hex representation of each of the bytes (not characters) in a string?

Answer by Stefan Gehrig for How can I get a hex dump of a string in PHP?

echo bin2hex($string);  

or:

for ($i = 0; $i < strlen($string); $i++) {      echo str_pad(dechex(ord($s[$i])), 2, '0', STR_PAD_LEFT);  }  

Answer by mindplay.dk for How can I get a hex dump of a string in PHP?

For debugging work with binary protocols, I needed a more traditional HEX dump, so I wrote this function:

function hex_dump($data, $newline="\n")  {    static $from = '';    static $to = '';      static $width = 16; # number of bytes per line      static $pad = '.'; # padding for non-visible characters      if ($from==='')    {      for ($i=0; $i<=0xFF; $i++)      {        $from .= chr($i);        $to .= ($i >= 0x20 && $i <= 0x7E) ? chr($i) : $pad;      }    }      $hex = str_split(bin2hex($data), $width*2);    $chars = str_split(strtr($data, $from, $to), $width);      $offset = 0;    foreach ($hex as $i => $line)    {      echo sprintf('%6X',$offset).' : '.implode(' ', str_split($line,2)) . ' [' . $chars[$i] . ']' . $newline;      $offset += $width;    }  }  

This produces a more traditional HEX dump, like this:

hex_dump($data);    =>     0 : 05 07 00 00 00 64 65 66 61 75 6c 74 40 00 00 00 [.....default@...]  10 : 31 42 38 43 39 44 30 34 46 34 33 36 31 33 38 33 [1B8C9D04F4361383]  20 : 46 34 36 32 32 46 33 39 32 46 44 38 43 33 42 30 [F4622F392FD8C3B0]  30 : 45 34 34 43 36 34 30 33 36 33 35 37 45 35 33 39 [E44C64036357E539]  40 : 43 43 38 44 35 31 34 42 44 36 39 39 46 30 31 34 [CC8D514BD699F014]  

Note that non-visible characters are replaced with a period - you can change the number of bytes per line ($width) and padding character ($pad) to suit your needs. I included a $newline argument, so you can pass "
" if you need to display the output in a browser.

Hope this is useful :-)

Answer by hek2mgl for How can I get a hex dump of a string in PHP?

While debugging a binary protocol I needed a hexdump() too. I decided to publish my solution as a PEAR package as it's definitely useful. You can also browse the code at github.

PEAR : http://www.metashock.de/pear

GitHub : http://www.github.com/metashock/Hexdump

In addition to mindplays solution it supports propper rendering of the last line and additional params. Also the package contains a php executable named phphd for hexdumps on cmdline. This might be helpful on Windows Systems :)

@mindplay.dk : Thanks for the strtr() idea. It appeared slight faster than my former attempt. Integrated that into my version. (Using a decreased translation buffer)..

Have Fun!

Answer by x-yuri for How can I get a hex dump of a string in PHP?

"Functional" version:

$s = "\x04\x00\xa0\x00";  echo implode(' ', array_map(function($char) {      # return sprintf('%02s', $char);      return str_pad($char, 2, '0', STR_PAD_LEFT);  }, array_map('dechex', unpack('C*', $s))));  

Borrowing from Ionu? G. Stan's comment, the last line might be as follows:

}, array_map('dechex', array_map('ord', str_split($s)))));  

Answer by Internal Server Error for How can I get a hex dump of a string in PHP?

It's years later, but in case others are searching for this too, I took the liberty to modify mindplay.dk's code to make it accept various options and simulate the output of the BSD command hexdump -C file:

/**  * Dumps a string into a traditional hex dump for programmers,  * in a format similar to the output of the BSD command hexdump -C file.  * The default result is a string.  * Supported options:  * 
  *   line_sep        - line seperator char, default = "\n"  *   bytes_per_line  - default = 16  *   pad_char        - character to replace non-readble characters with, default = '.'  * 
  *  * @param string $string  * @param array $options  * @param string|array  */  function hex_dump($string, array $options = null) {      if (!is_scalar($string)) {          throw new InvalidArgumentException('$string argument must be a string');      }      if (!is_array($options)) {          $options = array();      }      $line_sep       = isset($options['line_sep'])   ? $options['line_sep']          : "\n";      $bytes_per_line = @$options['bytes_per_line']   ? $options['bytes_per_line']    : 16;      $pad_char       = isset($options['pad_char'])   ? $options['pad_char']          : '.'; # padding for non-readable characters        $text_lines = str_split($string, $bytes_per_line);      $hex_lines  = str_split(bin2hex($string), $bytes_per_line * 2);        $offset = 0;      $output = array();      $bytes_per_line_div_2 = (int)($bytes_per_line / 2);      foreach ($hex_lines as $i => $hex_line) {          $text_line = $text_lines[$i];          $output []=              sprintf('%08X',$offset) . '  ' .              str_pad(                  strlen($text_line) > $bytes_per_line_div_2                  ?                      implode(' ', str_split(substr($hex_line,0,$bytes_per_line),2)) . '  ' .                      implode(' ', str_split(substr($hex_line,$bytes_per_line),2))                  :                  implode(' ', str_split($hex_line,2))              , $bytes_per_line * 3) .              '  |' . preg_replace('/[^\x20-\x7E]/', $pad_char, $text_line) . '|';          $offset += $bytes_per_line;      }      $output []= sprintf('%08X', strlen($string));      return @$options['want_array'] ? $output : join($line_sep, $output) . $line_sep;  }  

and this is a hex dump of a small file:

00000000  89 50 4e 47 0d 0a 1a 0a  00 00 00 0d 49 48 44 52  |.PNG........IHDR|  00000010  00 00 00 10 00 00 00 10  02 03 00 00 00 62 9d 17  |.............b..|  00000020  f2 00 00 00 09 50 4c 54  45 04 04 04 99 99 cc d7  |.....PLTE.......|  00000030  d7 d7 2a 66 f6 6b 00 00  00 38 49 44 41 54 78 9c  |..*f.k...8IDATx.|  00000040  63 08 05 02 06 24 22 0b  44 24 01 89 ac a4 69 4b  |c....$".D$....iK|  00000050  19 1a 16 68 70 31 74 29  75 2c 42 22 1a 16 75 00  |...hp1t)u,B"..u.|  00000060  c5 22 33 96 32 74 86 46  4c 65 58 19 1a 35 15 61  |."3.2t.FLeX..5.a|  00000070  00 00 df be 19 a6 2e 62  80 87 00 00 00 00 49 45  |.......b......IE|  00000080  4e 44 ae 42 60 82                                 |ND.B`.|  00000086  

and this is the phpunit test:

assertFileExists($file);          include($file);          $this->assertTrue(function_exists(static::FUNCTION_NAME));      }        public function testString() {          $func = static::FUNCTION_NAME;          $data = base64_decode(static::DATA_BASE64);          if (!is_string($data)) {              throw new Exception('Unable to decode base64 encoded test data');          }          $dump = $func($data);          //var_export($dump);          $this->assertTrue(is_string($dump));          $this->assertEquals($dump, join("\n", $this->expect) . "\n");      }    }      if (isset($argv)) {      $func = Test::FUNCTION_NAME;      require_once($func . '.php');      if (count($argv) < 2) {          print "Pass arguments file, from, length.\n";      }      else {          $file = $argv[1];          if (!file_exists($file)) {              die("File not found: $file\n");          }          $from   = isset($argv[2]) && preg_match('/^\d{1,9}$/', $argv[2]) ? intval($argv[2]) : null;          $len    = isset($argv[3]) && preg_match('/^\d{1,9}$/', $argv[3]) ? intval($argv[3]) : filesize($file);          $h = fopen($file, 'r');          if ($from) {              fseek($h, $from);          }          $data = fread($h, $len);          fclose($h);          $dump = hex_dump($data);          print $dump;          //$dump = hex_dump($data, array('want_array' => true));          //print_r($dump);      }  }  

Fatal error: Call to a member function getElementsByTagName() on a non-object in D:\XAMPP INSTALLASTION\xampp\htdocs\endunpratama9i\www-stackoverflow-info-proses.php on line 71