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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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174 |
|
175 | // If no fallback function was specified and the menu doesn't exists, bail. |
176 | if ( !$menu || is_wp_error($menu) ) |
177 | return false; |
178 |
|
179 | $nav_menu = $items = ''; |
180 |
|
181 | $show_container = false; |
182 | if ( $args->container ) { |
183 | $allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) ); |
184 | if ( in_array( $args->container, $allowed_tags ) ) { |
185 | $show_container = true; |
186 | $class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-'. $menu->slug .'-container"'; |
187 | $id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : ''; |
188 | $nav_menu .= '<'. $args->container . $id . $class . '>'; |
189 | } |
190 | } |
191 |
|
192 | // Set up the $menu_item variables |