Title: WP_List_Table::__isset
Published: September 4, 2014
Last modified: May 20, 2026

---

# WP_List_Table::__isset( string $name ): bool

## In this article

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

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

Makes private properties checkable for backward compatibility.

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

 `$name`stringrequired

Property to check if set.

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

 bool Whether the property is a back-compat property and it is set.

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

    ```php
    public function __isset( $name ) {
    	if ( in_array( $name, $this->compat_fields, true ) ) {
    		return isset( $this->$name );
    	}

    	wp_trigger_error(
    		__METHOD__,
    		"The property `{$name}` is not declared. Checking `isset()` on a dynamic property " .
    		'is deprecated since version 6.4.0! Instead, declare the property on the class.',
    		E_USER_DEPRECATED
    	);
    	return false;
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-admin/includes/class-wp-list-table.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-admin/includes/class-wp-list-table.php#L230)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-admin/includes/class-wp-list-table.php#L230-L242)

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

| Uses | Description | 
| [wp_trigger_error()](https://developer.wordpress.org/reference/functions/wp_trigger_error/)`wp-includes/functions.php` |

Generates a user-level error/warning/notice/deprecation message.

  |

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

| Version | Description | 
| [6.4.0](https://developer.wordpress.org/reference/since/6.4.0/) | Checking a dynamic property is deprecated. | 
| [4.0.0](https://developer.wordpress.org/reference/since/4.0.0/) | Introduced. |

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