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[Validator] feat : add password strength estimator related documentation#19910

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9 changes: 9 additions & 0 deletionsreference/constraints/PasswordStrength.rst
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Expand Up@@ -128,3 +128,12 @@ The default message supplied when the password does not reach the minimum requir
])]
protected $rawPassword;
}

Learn more
----------

.. toctree::
:maxdepth: 1
:glob:

/validation/passwordStrength/*
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@@ -0,0 +1,48 @@
How to Get or Override the Default Password Strength Estimation Algorithm
=========================================================================

Within the :class:`Symfony\\Component\\Validator\\Constraints\\PasswordStrengthValidator` a `dedicated function`_ is used to estimate the strength of the given password. This function can be retrieved directly from the :class:`Symfony\\Component\\Validator\\Constraints\\PasswordStrengthValidator` class and can also be overridden.

Get the default Password strength
---------------------------------

In case of need to retrieve the actual strength of a password (e.g. compute the score and display it when the user has defined a password), the ``estimateStrength`` `dedicated function`_ of the :class:`Symfony\\Component\\Validator\\Constraints\\PasswordStrengthValidator` is a public static function, therefore this function can be retrieved directly from the `PasswordStrengthValidator` class.::

use Symfony\Component\Validator\Constraints\PasswordStrengthValidator;

$passwordEstimatedStrength = PasswordStrengthValidator::estimateStrength($password);


Override the default Password strength estimation algorithm
-----------------------------------------------------------

If you need to override the default password strength estimation algorithm, you can pass a ``Closure`` to the :class:`Symfony\\Component\\Validator\\Constraints\\PasswordStrengthValidator` constructor. This can be done using the :doc:`/service_container/service_closures`.

First, create a custom password strength estimation algorithm within a dedicated callable class.::

namespace App\Validator;

class CustomPasswordStrengthEstimator
{
/**
* @param string $password
*
* @return PasswordStrength::STRENGTH_*
*/
public function __invoke(string $password): int
{
// Your custom password strength estimation algorithm
}
}

Then, configure the :class:`Symfony\\Component\\Validator\\Constraints\\PasswordStrengthValidator` service to use the custom password strength estimation algorithm.::

# config/services.yaml
services:
custom_password_strength_estimator:
class: App\Validator\CustomPasswordStrengthEstimator

Symfony\Component\Validator\Constraints\PasswordStrengthValidator:
arguments: [!service_closure '@custom_password_strength_estimator']

.. _`dedicated function`: https://github.com/symfony/symfony/blob/85db734e06e8cb32365810958326d48084bf48ba/src/Symfony/Component/Validator/Constraints/PasswordStrengthValidator.php#L53-L90
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