(PHP 4 >= 4.0.2, PHP 5, PHP 7 < 7.2.0, PECL mcrypt >= 1.0.0)
mcrypt_enc_is_block_mode — Checks whether the opened mode outputs blocks
This function has been DEPRECATED as of PHP 7.1.0. Relying on this function is highly discouraged.
$td
) : bool
Tells whether the opened mode outputs blocks (e.g. TRUE for cbc and ecb,
and FALSE for cfb and stream).
tdThe encryption descriptor.
Returns TRUE if the mode outputs blocks of bytes,
or FALSE if it outputs just bytes.