Manuel PHP
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# XI. Crack functions

These functions allow you to use the CrackLib library to test the 'strength' of a password. In order to use these functions, you must compile PHP with Crack support by using the `--with-crack` option.

More information regarding CrackLib along with the library can be found at http://www.users.dircon.co.uk/~crypto/.

Cracklib is useful in testing the 'strength' of a password that checks length, use of upper and lower case and a check against the specified CrackLib dictionary. CrackLib will also give helpful diagnostic messages that will help 'strengthen' the password.

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

Exemple 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);
    ?>

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

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