   #PHP Manual Mcrypt Encryption Functions
   mcrypt_module_get_algo_block_size
   mcrypt_module_get_supported_key_sizes

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                        mcrypt_module_get_algo_key_size

   (PHP 4 >= 4.0.2)
   mcrypt_module_get_algo_key_size -- Returns the maximum supported
   keysize of the opened mode

Description

   int mcrypt_module_get_algo_key_size ( string algorithm [, string
   lib_dir])

   This function returns the maximum supported key size of the algorithm
   specified in bytes. The optional lib_dir parameter can contain the
   location where the mode module is on the system.
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