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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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