   #PHP Manual Mcrypt Encryption Functions mcrypt_get_iv_size
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                              mcrypt_get_key_size

   (PHP 3>= 3.0.8, PHP 4 )
   mcrypt_get_key_size -- Get the key size of the specified cipher

Description

   int mcrypt_get_key_size ( int cipher)
   int mcrypt_get_key_size ( string cipher, string module)

   The first prototype is when linked against libmcrypt 2.2.x, the second
   when linked against libmcrypt 2.4.x or 2.5.x.

   mcrypt_get_key_size() is used to get the size of a key of the
   specified cipher (in combination with an encryption mode).

   This example shows how to use this function when linked against
   libmcrypt 2.4.x and 2.5.x.

   Example 1. mcrypt_get_block_size() example
   <?php
       echo mcrypt_get_key_size('tripledes', 'ecb');
   ?>
   Prints:
   24

   See also: mcrypt_get_block_size() and mcrypt_encrypt().
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