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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 |
|---|---|
| 338 | |
| 339 | /** |
| 340 | * Filter the HTML list content for navigation menus. |
| 341 | * |
| 342 | * @since 3.0.0 |
| 343 | * |
| 344 | * @param string $items The HTML list content for the menu items. |
| 345 | * @param array $args Arguments from {@see wp_nav_menu()}. |
| 346 | */ |
| 347 | $items = apply_filters( 'wp_nav_menu_items', $items, $args ); |
| 348 | /** |
| 349 | * Filter the HTML list content for a specific navigation menu. |
| 350 | * |
| 351 | * @since 3.0.0 |
| 352 | * |
| 353 | * @param string $items The HTML list content for the menu items. |
| 354 | * @param array $args Arguments from {@see wp_nav_menu()}. |
| 355 | */ |
| 356 | $items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args ); |