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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 |
|---|---|
| 231 | $wrap_id = $wrap_id . '-1'; |
| 232 | } |
| 233 | } |
| 234 | $menu_id_slugs[] = $wrap_id; |
| 235 | |
| 236 | $wrap_class = $args->menu_class ? $args->menu_class : ''; |
| 237 | |
| 238 | // Allow plugins to hook into the menu to add their own <li>'s |
| 239 | $items = apply_filters( 'wp_nav_menu_items', $items, $args ); |
| 240 | $items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args ); |
| 241 | |
| 242 | // Don't print any markup if there are no items at this point. |
| 243 | if ( empty( $items ) ) |
| 244 | return false; |
| 245 | |
| 246 | $nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items ); |
| 247 | unset( $items ); |
| 248 | |
| 249 | if ( $show_container ) |