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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 |
|---|---|
| 642 | // Quick check to see if an honest cookie has expired |
| 643 | if ( $expired < time() ) { |
| 644 | /** |
| 645 | * Fires once an authentication cookie has expired. |
| 646 | * |
| 647 | * @since 2.7.0 |
| 648 | * |
| 649 | * @param array $cookie_elements An array of data for the authentication cookie. |
| 650 | */ |
| 651 | do_action( 'auth_cookie_expired', $cookie_elements ); |
| 652 | return false; |
| 653 | } |
| 654 | |
| 655 | $user = get_user_by('login', $username); |
| 656 | if ( ! $user ) { |
| 657 | /** |
| 658 | * Fires if a bad username is entered in the user authentication process. |
| 659 | * |
| 660 | * @since 2.7.0 |