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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 |
|---|---|
| 88 | /** |
| 89 | * Filter the arguments for a single nav menu item. |
| 90 | * |
| 91 | * @since 4.4.0 |
| 92 | * |
| 93 | * @param array $args An array of arguments. |
| 94 | * @param object $item Menu item data object. |
| 95 | * @param int $depth Depth of menu item. Used for padding. |
| 96 | */ |
| 97 | $args = apply_filters( 'nav_menu_item_args', $args, $item, $depth ); |
| 98 | |
| 99 | /** |
| 100 | * Filter the CSS class(es) applied to a menu item's list item element. |
| 101 | * |
| 102 | * @since 3.0.0 |
| 103 | * @since 4.1.0 The `$depth` parameter was added. |
| 104 | * |
| 105 | * @param array $classes The CSS classes that are applied to the menu item's `<li>` element. |
| 106 | * @param object $item The current menu item. |