Title: WP_HTML_Open_Elements::contains
Published: February 24, 2026

---

# WP_HTML_Open_Elements::contains( string $node_name ): bool

## In this article

 * [Parameters](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#wp--skip-link--target)

Reports if a node of a given name is in the stack of open elements.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#parameters)󠁿

 `$node_name`stringrequired

Name of node for which to check.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#return)󠁿

 bool Whether a node of the given name is in the stack of open elements.

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#source)󠁿

    ```php
    public function contains( string $node_name ): bool {
    	foreach ( $this->walk_up() as $item ) {
    		if ( $node_name === $item->node_name ) {
    			return true;
    		}
    	}

    	return false;
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/html-api/class-wp-html-open-elements.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/6.9.4/src/wp-includes/html-api/class-wp-html-open-elements.php#L137)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-includes/html-api/class-wp-html-open-elements.php#L137-L145)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#related)󠁿

| Uses | Description | 
| [WP_HTML_Open_Elements::walk_up()](https://developer.wordpress.org/reference/classes/wp_html_open_elements/walk_up/)`wp-includes/html-api/class-wp-html-open-elements.php` |

Steps through the stack of open elements, starting with the bottom element (added last) and walking upwards to the one added first.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wp_html_open_elements/contains/?output_format=md#changelog)󠁿

| Version | Description | 
| [6.7.0](https://developer.wordpress.org/reference/since/6.7.0/) | Introduced. |

## User Contributed Notes

You must [log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fdeveloper.wordpress.org%2Freference%2Fclasses%2Fwp_html_open_elements%2Fcontains%2F)
before being able to contribute a note or feedback.