mcrypt_module_get_supported_key_sizes(3) php man page | unix.com

MCRYPT_MODULE_GET_SUPPORTED_KEY_SIZES(3)				 1				  MCRYPT_MODULE_GET_SUPPORTED_KEY_SIZES(3)

mcrypt_module_get_supported_key_sizes - Returns an array with the supported keysizes of the opened algorithm

SYNOPSIS
       array mcrypt_module_get_supported_key_sizes (string  $algorithm, [string  $lib_dir])

DESCRIPTION
	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(3) are supported by the algorithm.

PARAMETERS
	      o $algorithm
		- The algorithm to be used.

	      o $lib_dir
		- The optional $lib_dir parameter can contain the location where the algorithm module is on the system.

RETURN VALUES
	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(3) are supported by the algorithm.

SEE ALSO
       mcrypt_enc_get_supported_key_sizes(3).

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