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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 |
---|---|
102 | /** |
103 | * Filter the ID applied to a menu item's <li>. |
104 | * |
105 | * @since 3.0.1 |
106 | * |
107 | * @param string The ID that is applied to the menu item's <li>. |
108 | * @param object $item The current menu item. |
109 | * @param array $args An array of arguments. @see wp_nav_menu() |
110 | */ |
111 | $id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args ); |
112 | $id = $id ? ' id="' . esc_attr( $id ) . '"' : ''; |
113 |
|
114 | $output .= $indent . '<li' . $id . $value . $class_names .'>'; |
115 |
|
116 | $atts = array(); |
117 | $atts['title'] = ! empty( $item->attr_title ) ? $item->attr_title : ''; |
118 | $atts['target'] = ! empty( $item->target ) ? $item->target : ''; |
119 | $atts['rel'] = ! empty( $item->xfn ) ? $item->xfn : ''; |
120 | $atts['href'] = ! empty( $item->url ) ? $item->url : ''; |