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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 | * This is useful for `WP_Customize_Setting` instances to watch |
| 705 | * in order to update a cached previewed value. |
| 706 | * |
| 707 | * @since 4.4.0 |
| 708 | * |
| 709 | * @param string $setting_id Setting ID. |
| 710 | * @param mixed $value Unsanitized setting post value. |
| 711 | * @param WP_Customize_Manager $this WP_Customize_Manager instance. |
| 712 | */ |
| 713 | do_action( 'customize_post_value_set', $setting_id, $value, $this ); |
| 714 | } |
| 715 | |
| 716 | /** |
| 717 | * Print JavaScript settings. |
| 718 | * |
| 719 | * @since 3.4.0 |
| 720 | */ |
| 721 | public function customize_preview_init() { |
| 722 | $this->nonce_tick = check_ajax_referer( 'preview-customize_' . $this->get_stylesheet(), 'nonce' ); |