Mcrypt Functions
PHP Manual

mcrypt_enc_is_block_algorithm

Checks whether the algorithm of the opened mode is a block algorithm

Warning

This function has been DEPRECATED as of PHP 7.1.0 and REMOVED as of PHP 7.2.0. Relying on this function is highly discouraged.

Description

bool mcrypt_enc_is_block_algorithm(resource $td)

Tells whether the algorithm of the opened mode is a block algorithm.

Parameters

td

The encryption descriptor.

Return Values

Returns true if the algorithm is a block algorithm or false if it is a stream one.