   #PHP Manual Mcrypt Encryption Functions
   mcrypt_module_get_supported_key_sizes mcrypt_module_is_block_algorithm

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                     mcrypt_module_is_block_algorithm_mode

   (PHP 4 >= 4.0.2)
   mcrypt_module_is_block_algorithm_mode -- This function returns if the
   the specified module is a block algorithm or not

Description

   bool mcrypt_module_is_block_algorithm_mode ( string mode [, string
   lib_dir])

   This function returns TRUE if the mode is for use with block
   algorithms, otherwise it returns FALSE. (e.g. FALSE for stream, and
   TRUE for cbc, cfb, ofb). The optional lib_dir parameter can contain
   the location where the mode module is on the system.
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