apply_filters( 'authenticate', null|WP_User|WP_Error $user, string $username, string $password )

Filters whether a set of user login credentials are valid.

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Description Description

A WP_User object is returned if the credentials authenticate a user. WP_Error or null otherwise.

Parameters Parameters

$user

(null|WP_User|WP_Error) WP_User if the user is authenticated. WP_Error or null otherwise.

$username

(string) Username or email address.

$password

(string) User password

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Source Source

File: wp-includes/pluggable.php

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Changelog Changelog

Changelog
Version Description
4.5.0 $username now accepts an email address.
2.8.0 Introduced.

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Used By Used By

Used By
Used By Description
wp-includes/pluggable.php: wp_authenticate()

Authenticate a user, confirming the login credentials are valid.

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User Contributed Notes User Contributed Notes

  1. Skip to note 1 content
    You must log in to vote on the helpfulness of this noteVote results for this note: 0You must log in to vote on the helpfulness of this note
    Contributed by Rahul Prajapati —

    ==Examples==
    The basic usage is as follows…

    add_filter( 'authenticate', 'myplugin_auth_signon', 30, 3 );
function myplugin_auth_signon( $user, $username, $password ) {
     return $user;
}

    This hook passes three parameters, $user, $username and $password. In order to generate an error on login, you will need to return a WP_Error object.

  2. Skip to note 2 content
    You must log in to vote on the helpfulness of this noteVote results for this note: -1You must log in to vote on the helpfulness of this note
    Contributed by pronl —

    … or simply return null.

    WordPress will assign a standard WP_Error object:

    if ( $user == null ) {
	// TODO what should the error message be? (Or would these even happen?)
	// Only needed if all authentication handlers fail to return anything.
	$user = new WP_Error( 'authentication_failed', __( '<strong>ERROR</strong>: Invalid username, email address or incorrect password.' ) );
}

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