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# XI.Crack Functions

# 介紹

These functions allow you to use the CrackLib library to test the 'strength' of a password. The 'strength' of a password is tested by that checks length, use of upper and lower case and checked against the specified CrackLib dictionary. CrackLib will also give helpful diagnostic messages that will help 'strengthen' the password.

> 備注: This extension has been removed as of PHP 5 and moved to the PECL repository.

# 需求

More information regarding CrackLib along with the library can be found at http://www.crypticide.org/users/alecm/.

# 安裝

In order to use these functions, you must compile PHP with Crack support by using the --with-crack[=DIR] option.

# 執行時期組態

`php.ini`中的設定會影響這些函數的行為。

表格 1.Crack configuration options

Name | Default | Changeable
--- | --- | ---
crack.default_dictionary | NULL | PHP_INI_SYSTEM

For further details and definition of the PHP_INI_* constants see ini_set().

# 資源類型

這個延伸沒有定義任何資源。

# 預先定義常數

這個延伸沒有定義任何常數。

# 範例

This example shows how to open a CrackLib dictionary, test a given password, retrieve any diagnostic messages, and close the dictionary.

示範 1.CrackLib example
`<?php // Open CrackLib Dictionary $dictionary = crack_opendict('/usr/local/lib/pw_dict') or die('Unable to open CrackLib dictionary'); // Perform password check $check = crack_check($dictionary, 'gx9A2s0x'); // Retrieve messages $diag = crack_getlastmessage(); echo $diag; // 'strong password' // Close dictionary crack_closedict($dictionary); ?>`

> 備注: If crack_check() returns `TRUE`, crack_getlastmessage() will return 'strong password'.

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