MCRYPT_ENC_IS_BLOCK_MODE(3) 1 MCRYPT_ENC_IS_BLOCK_MODE(3) mcrypt_enc_is_block_mode - Checks whether the opened mode outputs blocksSYNOPSISbool mcrypt_enc_is_block_mode (resource $td)DESCRIPTIONTells whether the opened mode outputs blocks (e.g. TRUE for cbc and ecb, and FALSE for cfb and stream).PARAMETERSo $td - The encryption descriptor.RETURN VALUESReturns TRUE if the mode outputs blocks of bytes, or FALSE if it outputs just bytes. PHP Documentation Group MCRYPT_ENC_IS_BLOCK_MODE(3)