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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 |
|---|---|
| 131 | /** |
| 132 | * Filters the arguments for the Categories widget. |
| 133 | * |
| 134 | * @since 2.8.0 |
| 135 | * @since 4.9.0 Added the `$instance` parameter. |
| 136 | * |
| 137 | * @param array $cat_args An array of Categories widget options. |
| 138 | * @param array $instance Array of settings for the current widget. |
| 139 | */ |
| 140 | wp_list_categories( apply_filters( 'widget_categories_args', $cat_args, $instance ) ); |
| 141 | ?> |
| 142 | </ul> |
| 143 | |
| 144 | <?php |
| 145 | if ( 'html5' === $format ) { |
| 146 | echo '</nav>'; |
| 147 | } |
| 148 | } |
| 149 | |