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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 |
|---|---|
| 136 | /** |
| 137 | * Filters the arguments for a single nav menu item. |
| 138 | * |
| 139 | * @since 4.4.0 |
| 140 | * |
| 141 | * @param stdClass $args An object of wp_nav_menu() arguments. |
| 142 | * @param WP_Post $menu_item Menu item data object. |
| 143 | * @param int $depth Depth of menu item. Used for padding. |
| 144 | */ |
| 145 | $args = apply_filters( 'nav_menu_item_args', $args, $menu_item, $depth ); |
| 146 | |
| 147 | /** |
| 148 | * Filters the CSS classes applied to a menu item's list item element. |
| 149 | * |
| 150 | * @since 3.0.0 |
| 151 | * @since 4.1.0 The `$depth` parameter was added. |
| 152 | * |
| 153 | * @param string[] $classes Array of the CSS classes that are applied to the menu item's `<li>` element. |
| 154 | * @param WP_Post $menu_item The current menu item object. |