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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
634 | * Fires after a user login has failed. |
635 | * |
636 | * @since 2.5.0 |
637 | * @since 4.5.0 The value of `$username` can now be an email address. |
638 | * @since 5.4.0 The `$error` parameter was added. |
639 | * |
640 | * @param string $username Username or email address. |
641 | * @param WP_Error $error A WP_Error object with the authentication failure details. |
642 | */ |
643 | do_action( 'wp_login_failed', $username, $error ); |
644 | } |
645 |
|
646 | return $user; |
647 | } |
648 | endif; |
649 |
|
650 | if ( ! function_exists( 'wp_logout' ) ) : |
651 | /** |
652 | * Log the current user out. |