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PHP mcrypt_module_get_algo_key_size

PHP original manual for mcrypt_module_get_algo_key_size [ show | php.net ]

(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)

mcrypt_module_get_algo_key_size — Returns the maximum supported keysize of the opened mode

Warning

This function has been DEPRECATED as of PHP 7.1.0. Relying on this function is highly discouraged.

int mcrypt_module_get_algo_key_size ( string $algorithm [, string $lib_dir ] )

Gets the maximum supported keysize of the opened mode.

algorithm: The algorithm name.
lib_dir: This optional parameter can contain the location where the mode module is on the system.

This function returns the maximum supported key size of the algorithm specified in bytes.