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                                      md5

   (PHP 3, PHP 4 )
   md5 -- Calculate the md5 hash of a string

Description

   string md5 ( string str [, bool raw_output])

   Calculates the MD5 hash of str using the RSA Data Security, Inc. MD5
   Message-Digest Algorithm, and returns that hash. The hash is a
   32-character hexadecimal number. If the optional raw_output is set to
   TRUE, then the md5 digest is instead returned in raw binary format
   with a length of 16.

     Note: The optional raw_output parameter was added in PHP 5.0.0 and
     defaults to FALSE

   Example 1. A md5() example
   <?php
   $str = 'apple';
   if (md5($str) === '1f3870be274f6c49b3e31a0c6728957f') {
       echo "Would you like a green or red apple?";
       exit;
   }
   ?>

   See also crc32(), md5_file(), and sha1().
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