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# mcrypt_enc_is_block_algorithm_mode

(PHP 4 >= 4.0.2)

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

## Description

``int mcrypt_enc_is_block_algorithm_mode` (resource td)`

This function returns 1 if the mode is for use with block algorithms, otherwise it returns 0. (eg. 0 for stream, and 1 for cbc, cfb, ofb).

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