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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 |
|---|---|
| 115 | /** |
| 116 | * Filters the arguments for the Categories widget. |
| 117 | * |
| 118 | * @since 2.8.0 |
| 119 | * @since 4.9.0 Added the `$instance` parameter. |
| 120 | * |
| 121 | * @param array $cat_args An array of Categories widget options. |
| 122 | * @param array $instance Array of settings for the current widget. |
| 123 | */ |
| 124 | wp_list_categories( apply_filters( 'widget_categories_args', $cat_args, $instance ) ); |
| 125 | ?> |
| 126 | </ul> |
| 127 | <?php |
| 128 | } |
| 129 | |
| 130 | echo $args['after_widget']; |
| 131 | } |
| 132 | |
| 133 | /** |