(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).
td
The encryption descriptor.
Returns TRUE
if the mode outputs blocks of bytes,
or FALSE
if it outputs just bytes.