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Returns the maximum supported keysize of the opened mode
Mcrypt Functions
PHP Manual

mcrypt_enc_get_key_size

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_enc_get_key_sizeReturns the maximum supported keysize of the opened mode

Description

int mcrypt_enc_get_key_size ( resource $td )

Gets the maximum supported key size of the algorithm in bytes.

Parameters

td

The encryption descriptor.

Return Values

Returns the maximum supported key size of the algorithm in bytes.


Mcrypt Functions
PHP Manual