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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 |
|---|---|
| 135 | if ( $args->container ) { |
| 136 | /** |
| 137 | * Filters the list of HTML tags that are valid for use as menu containers. |
| 138 | * |
| 139 | * @since 3.0.0 |
| 140 | * |
| 141 | * @param array $tags The acceptable HTML tags for use as menu containers. |
| 142 | * Default is array containing 'div' and 'nav'. |
| 143 | */ |
| 144 | $allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) ); |
| 145 | if ( is_string( $args->container ) && in_array( $args->container, $allowed_tags ) ) { |
| 146 | $show_container = true; |
| 147 | $class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-'. $menu->slug .'-container"'; |
| 148 | $id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : ''; |
| 149 | $nav_menu .= '<'. $args->container . $id . $class . '>'; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | // Set up the $menu_item variables |