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# mcrypt_enc_is_block_mode

(PHP 4 >= 4.0.2)

mcrypt_enc_is_block_mode -- Checks whether the opened mode outputs blocks

## Description

bool mcrypt_enc_is_block_mode ( resource td)

This function returns `TRUE` if the mode outputs blocks of bytes or `FALSE` if it outputs bytes. (eg. `TRUE` for cbc and ecb, and `FALSE` for cfb and stream).

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