Руководство по PHP
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# 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).

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mcrypt_enc_get_supported_key_sizes | Уровень выше | mcrypt_enc_is_block_algorithm