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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 |
---|---|
622 | * Fires after a user login has failed. |
623 | * |
624 | * @since 2.5.0 |
625 | * @since 4.5.0 The value of `$username` can now be an email address. |
626 | * @since 5.4.0 The `$error` parameter was added. |
627 | * |
628 | * @param string $username Username or email address. |
629 | * @param WP_Error $error A WP_Error object with the authentication failure details. |
630 | */ |
631 | do_action( 'wp_login_failed', $username, $error ); |
632 | } |
633 |
|
634 | return $user; |
635 | } |
636 | endif; |
637 |
|
638 | if ( ! function_exists( 'wp_logout' ) ) : |
639 | /** |
640 | * Log the current user out. |