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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 |
---|---|
89 | * |
90 | * @since 3.0.0 |
91 | * @since 4.1.0 The `$depth` parameter was added. |
92 | * |
93 | * @param array $classes The CSS classes that are applied to the menu item's `<li>` element. |
94 | * @param object $item The current menu item. |
95 | * @param array $args An array of {@see wp_nav_menu()} arguments. |
96 | * @param int $depth Depth of menu item. Used for padding. |
97 | */ |
98 | $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args, $depth ) ); |
99 | $class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : ''; |
100 |
|
101 | /** |
102 | * Filter the ID applied to a menu item's list item element. |
103 | * |
104 | * @since 3.0.1 |
105 | * @since 4.1.0 The `$depth` parameter was added. |
106 | * |
107 | * @param string $menu_id The ID that is applied to the menu item's `<li>` element. |