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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 |
|---|---|
| 811 | * containing the widget object. Fired on the back end, `$callback` |
| 812 | * is 'wp_widget_control', see `$_callback`. |
| 813 | * @type array $params An associative array of multi-widget arguments. |
| 814 | * @type string $classname CSS class applied to the widget container. |
| 815 | * @type string $description The widget description. |
| 816 | * @type array $_callback When the hook is fired on the back end, `$_callback` is populated |
| 817 | * with an array containing the widget object, see `$callback`. |
| 818 | * } |
| 819 | */ |
| 820 | do_action( 'dynamic_sidebar', $wp_registered_widgets[ $id ] ); |
| 821 | |
| 822 | if ( is_callable( $callback ) ) { |
| 823 | call_user_func_array( $callback, $params ); |
| 824 | $did_one = true; |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | if ( ! is_admin() && ! empty( $sidebar['after_sidebar'] ) ) { |
| 829 | echo $sidebar['after_sidebar']; |