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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 |
|---|---|
| 1875 | * This is useful for `WP_Customize_Setting` instances to watch |
| 1876 | * in order to update a cached previewed value. |
| 1877 | * |
| 1878 | * @since 4.4.0 |
| 1879 | * |
| 1880 | * @param string $setting_id Setting ID. |
| 1881 | * @param mixed $value Unsanitized setting post value. |
| 1882 | * @param WP_Customize_Manager $manager WP_Customize_Manager instance. |
| 1883 | */ |
| 1884 | do_action( 'customize_post_value_set', $setting_id, $value, $this ); |
| 1885 | } |
| 1886 | |
| 1887 | /** |
| 1888 | * Prints JavaScript settings. |
| 1889 | * |
| 1890 | * @since 3.4.0 |
| 1891 | */ |
| 1892 | public function customize_preview_init() { |
| 1893 | |