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# mcrypt_list_modes

(PHP 4 >= 4.0.2, PHP 5)

mcrypt_list_modes -- Get an array of all supported modes

## Description

array mcrypt_list_modes ( [string lib_dir] )

mcrypt_list_modes() is used to get an array of all supported modes in the lib_dir.

mcrypt_list_modes() takes as optional parameter a directory which specifies the directory where all modes are located. If not specifies, the value of the mcrypt.modes_dir `php.ini` directive is used.

範例 1. mcrypt_list_modes() Example

`<?php $modes = mcrypt_list_modes(); foreach ($modes as $mode) { echo "$mode <br />\n"; } ?>`

The above example will produce a list with all supported algorithms in the default mode directory. If it is not set with the ini directive mcrypt.modes_dir, the default directory of mcrypt is used (which is /usr/local/lib/libmcrypt).

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