# mcrypt_enc_is_block_algorithm_mode

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_enc_is_block_algorithm_mode — Checks whether the encryption of the opened mode works on blocks

### Description

bool mcrypt_enc_is_block_algorithm_mode ( resource `$td` )

This function returns `TRUE` if the mode is for use with block algorithms, otherwise it returns `FALSE`. (e.g. `FALSE` for stream, and `TRUE` for cbc, cfb, ofb).