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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 |
|---|---|
| 253 | * no filter for modifying the opening and closing `<li>` for a menu item. |
| 254 | * |
| 255 | * @since 3.0.0 |
| 256 | * |
| 257 | * @param string $item_output The menu item's starting HTML output. |
| 258 | * @param WP_Post $menu_item Menu item data object. |
| 259 | * @param int $depth Depth of menu item. Used for padding. |
| 260 | * @param stdClass $args An object of wp_nav_menu() arguments. |
| 261 | */ |
| 262 | $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $menu_item, $depth, $args ); |
| 263 | } |
| 264 | |
| 265 | /** |
| 266 | * Ends the element output, if needed. |
| 267 | * |
| 268 | * @since 3.0.0 |
| 269 | * @since 5.9.0 Renamed `$item` to `$data_object` to match parent class for PHP 8 named parameter support. |
| 270 | * |
| 271 | * @see Walker::end_el() |