   #PHP Manual Mcrypt Encryption Functions
   mcrypt_module_get_algo_key_size mcrypt_module_is_block_algorithm_mode

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                     mcrypt_module_get_supported_key_sizes

   (PHP 4 >= 4.0.2)
   mcrypt_module_get_supported_key_sizes -- Returns an array with the
   supported keysizes of the opened algorithm

Description

   array mcrypt_module_get_supported_key_sizes ( string algorithm [,
   string lib_dir])

   Returns an array with the key sizes supported by the specified
   algorithm. If it returns an empty array then all key sizes between 1
   and mcrypt_module_get_algo_key_size() are supported by the algorithm.
   The optional lib_dir parameter can contain the location where the mode
   module is on the system.

   See also mcrypt_enc_get_supported_key_sizes() which is used on open
   encryption modules.
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