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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 |
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158 | * |
159 | * @since 3.0.1 |
160 | * @since 4.1.0 The `$depth` parameter was added. |
161 | * |
162 | * @param string $menu_id The ID that is applied to the menu item's `<li>` element. |
163 | * @param WP_Post $item The current menu item. |
164 | * @param stdClass $args An object of wp_nav_menu() arguments. |
165 | * @param int $depth Depth of menu item. Used for padding. |
166 | */ |
167 | $id = apply_filters( 'nav_menu_item_id', 'menu-item-' . $item->ID, $item, $args, $depth ); |
168 | $id = $id ? ' id="' . esc_attr( $id ) . '"' : ''; |
169 |
|
170 | $output .= $indent . '<li' . $id . $class_names . '>'; |
171 |
|
172 | $atts = array(); |
173 | $atts['title'] = ! empty( $item->attr_title ) ? $item->attr_title : ''; |
174 | $atts['target'] = ! empty( $item->target ) ? $item->target : ''; |
175 | if ( '_blank' === $item->target && empty( $item->xfn ) ) { |
176 | $atts['rel'] = 'noopener'; |