mcrypt_module_get_algo_block_size Returns the blocksize of the specified algorithm &warn.deprecated.function-7-1-0; &reftitle.description; intmcrypt_module_get_algo_block_size stringalgorithm stringlib_dir Gets the blocksize of the specified algorithm. &reftitle.parameters; algorithm The algorithm name. lib_dir This optional parameter can contain the location where the mode module is on the system. &reftitle.returnvalues; Returns the block size of the algorithm specified in bytes.