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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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169 |
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170 | // If no fallback function was specified and the menu doesn't exists, bail. |
171 | if ( !$menu || is_wp_error($menu) ) |
172 | return false; |
173 |
|
174 | $nav_menu = $items = ''; |
175 |
|
176 | $show_container = false; |
177 | if ( $args->container ) { |
178 | $allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) ); |
179 | if ( in_array( $args->container, $allowed_tags ) ) { |
180 | $show_container = true; |
181 | $class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-'. $menu->slug .'-container"'; |
182 | $id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : ''; |
183 | $nav_menu .= '<'. $args->container . $id . $class . '>'; |
184 | } |
185 | } |
186 |
|
187 | // Set up the $menu_item variables |