XI. Crack functions

Úvod

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.

Požiadavky

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

Inštalácia

Aby ste tieto funkcie mohli používať, musíte PHP skompilovať s Crack podporou pomocou --with-crack[=DIR] voľby.

Konfigurácia behu

The behaviour of these functions is affected by settings in php.ini.

Tabuľka 1. Crack configuration options

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

Typy prostriedkov

This extension does not define any resource types.

Preddefinované konštanty

This extension does not define any constants.

Príklady

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

Príklad 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);
?>

Poznámka: If crack_check() returns TRUE, crack_getlastmessage() will return 'strong password'.

Obsah
crack_check -- Performs an obscure check with the given password
crack_closedict -- Closes an open CrackLib dictionary
crack_getlastmessage -- Returns the message from the last obscure check
crack_opendict -- Opens a new CrackLib dictionary