mcrypt_enc_is_block_mode Checks whether the opened mode outputs blocks &reftitle.description; boolmcrypt_enc_is_block_mode resourcetd Tells whether the opened mode outputs blocks (e.g. &true; for cbc and ecb, and &false; for cfb and stream). &reftitle.parameters; td The encryption descriptor. &reftitle.returnvalues; Returns &true; if the mode outputs blocks of bytes, or &false; if it outputs just bytes.