mcrypt_enc_is_block_algorithm

PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0
mcrypt_enc_is_block_algorithm - Checks whether the algorithm of the opened mode is a block algorithm
Manual

mcrypt_enc_is_block_algorithm( resource$td ): bool

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.