Hello, if you know what this Subject line means I am impressed. If not then go to www.php.net and type in Pack in the Search functions list...read...and come back. Ok now that we are all refreshed with this. . HOW DO I USE IT!?! Lets say that I have a password of ABC123. I need to break it down to Binary form. How the heck can I use Pack to do it? It says it will take a string and break it to binary. Well how can I do that? Then use the unpack to get it back to its original form? PHP.net really didn't explain it very clearly in my mind. Hope someone can help. Thanks!
Ziggs

    Here's a real rudimentary bit of code to pack text into a binary string with pack and unpack back into human readable chars:

    <?
    $str = "TEXT_MESSAGE";

    //the easy part is 'encrypting' it...
    for($i=0;$i<strlen($str);$i++) { $enc .= pack('C',decbin(ord(substr($str,$i,1)))); }
    echo "Here's the binary output<br>\n";
    echo $enc;

    //now to decode...
    $dump = unpack('C*',$enc);
    echo "<p>Here is what we found...</p>\n";
    print_r($dump);

    foreach ($dump as $key=>$val) {
for ($x=0;$x<(8-strlen($val));$x++) { $val .= '0'; }
$test = chr(decbin($val));
	if (ord($test) < 255) {
  $str .= $test;
  }
}

    echo "<p>And here's the decrypted string: " . $str;

    ?>

    ...now, you can learn all about bitmasking by reading up on bitwise operators to shuffle the binary data to actually create a cypher.

    Enjoy

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