(PHP 4 >= 4.0.2, PHP 5, PHP 7)
mcrypt_enc_is_block_mode — Checks whether the opened mode outputs blocks
$td
)
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.