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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 |
|---|---|
| 229 | * no filter for modifying the opening and closing `<li>` for a menu item. |
| 230 | * |
| 231 | * @since 3.0.0 |
| 232 | * |
| 233 | * @param string $item_output The menu item's starting HTML output. |
| 234 | * @param WP_Post $item Menu item data object. |
| 235 | * @param int $depth Depth of menu item. Used for padding. |
| 236 | * @param stdClass $args An object of wp_nav_menu() arguments. |
| 237 | */ |
| 238 | $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args ); |
| 239 | } |
| 240 | |
| 241 | /** |
| 242 | * Ends the element output, if needed. |
| 243 | * |
| 244 | * @since 3.0.0 |
| 245 | * |
| 246 | * @see Walker::end_el() |
| 247 | * |