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# mcrypt_module_is_block_mode

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_module_is_block_mode -- Returns if the specified mode outputs blocks or not

## Description

bool mcrypt_module_is_block_mode ( string mode [, string lib_dir] )

This function returns `TRUE` if the mode outputs blocks of bytes or `FALSE` if it outputs just bytes. (e.g. `TRUE` for cbc and ecb, and `FALSE` for cfb and stream). The optional lib_dir parameter can contain the location where the mode module is on the system.

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