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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 |
|---|---|
| 704 | 'heartbeat', |
| 705 | 'heartbeatSettings', |
| 706 | /** |
| 707 | * Filters the Heartbeat settings. |
| 708 | * |
| 709 | * @since 3.6.0 |
| 710 | * |
| 711 | * @param array $settings Heartbeat settings array. |
| 712 | */ |
| 713 | apply_filters( 'heartbeat_settings', array() ) |
| 714 | ); |
| 715 | |
| 716 | $scripts->add( 'wp-auth-check', "/wp-includes/js/wp-auth-check$suffix.js", array( 'heartbeat' ), false, 1 ); |
| 717 | did_action( 'init' ) && $scripts->localize( |
| 718 | 'wp-auth-check', |
| 719 | 'authcheckL10n', |
| 720 | array( |
| 721 | 'beforeunload' => __( 'Your session has expired. You can log in again from this page or go to the login page.' ), |
| 722 | |