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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 |
|---|---|
| 1824 | * This is useful for `WP_Customize_Setting` instances to watch |
| 1825 | * in order to update a cached previewed value. |
| 1826 | * |
| 1827 | * @since 4.4.0 |
| 1828 | * |
| 1829 | * @param string $setting_id Setting ID. |
| 1830 | * @param mixed $value Unsanitized setting post value. |
| 1831 | * @param WP_Customize_Manager $this WP_Customize_Manager instance. |
| 1832 | */ |
| 1833 | do_action( 'customize_post_value_set', $setting_id, $value, $this ); |
| 1834 | } |
| 1835 | |
| 1836 | /** |
| 1837 | * Print JavaScript settings. |
| 1838 | * |
| 1839 | * @since 3.4.0 |
| 1840 | */ |
| 1841 | public function customize_preview_init() { |
| 1842 | |