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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.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 826 | /** |
| 827 | * Filter the duration of the authentication cookie expiration period. |
| 828 | * |
| 829 | * @since 2.8.0 |
| 830 | * |
| 831 | * @param int $length Duration of the expiration period in seconds. |
| 832 | * @param int $user_id User ID. |
| 833 | * @param bool $remember Whether to remember the user login. Default false. |
| 834 | */ |
| 835 | $expiration = time() + apply_filters( 'auth_cookie_expiration', 14 * DAY_IN_SECONDS, $user_id, $remember ); |
| 836 | |
| 837 | /* |
| 838 | * Ensure the browser will continue to send the cookie after the expiration time is reached. |
| 839 | * Needed for the login grace period in wp_validate_auth_cookie(). |
| 840 | */ |
| 841 | $expire = $expiration + ( 12 * HOUR_IN_SECONDS ); |
| 842 | } else { |
| 843 | /** This filter is documented in wp-includes/pluggable.php */ |
| 844 | $expiration = time() + apply_filters( 'auth_cookie_expiration', 2 * DAY_IN_SECONDS, $user_id, $remember ); |
| 845 | $expire = 0; |
| 846 | } |
| 847 | |
| 848 | if ( '' === $secure ) { |
| 849 | $secure = is_ssl(); |
| 850 | } |
| 851 | |
| 852 | // Frontend cookie is secure when the auth cookie is secure and the site's home URL is forced HTTPS. |
| 853 | $secure_logged_in_cookie = $secure && 'https' === parse_url( get_option( 'home' ), PHP_URL_SCHEME ); |