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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 |
|---|---|
| 391 | * Filter the HTML list content for a specific navigation menu. |
| 392 | * |
| 393 | * @since 3.0.0 |
| 394 | * |
| 395 | * @see wp_nav_menu() |
| 396 | * |
| 397 | * @param string $items The HTML list content for the menu items. |
| 398 | * @param array $args Array of wp_nav_menu() arguments. |
| 399 | */ |
| 400 | $items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args ); |
| 401 | |
| 402 | // Don't print any markup if there are no items at this point. |
| 403 | if ( empty( $items ) ) |
| 404 | return false; |
| 405 | |
| 406 | $nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items ); |
| 407 | unset( $items ); |
| 408 | |
| 409 | if ( $show_container ) |