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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 |
|---|---|
| 2550 | |
| 2551 | /** |
| 2552 | * Fires immediately before the setting is unregistered and after its filters have been removed. |
| 2553 | * |
| 2554 | * @since 5.5.0 |
| 2555 | * |
| 2556 | * @param string $option_group Setting group. |
| 2557 | * @param string $option_name Setting name. |
| 2558 | */ |
| 2559 | do_action( 'unregister_setting', $option_group, $option_name ); |
| 2560 | |
| 2561 | unset( $wp_registered_settings[ $option_name ] ); |
| 2562 | } |
| 2563 | } |
| 2564 | |
| 2565 | /** |
| 2566 | * Retrieves an array of registered settings. |
| 2567 | * |
| 2568 | * @since 4.7.0 |