WP_List_Table::__isset() – Method | Developer.WordPress.org

WP_List_Table::__isset( string $name ): bool

Makes private properties checkable for backward compatibility.

Parameters

$namestringrequired: Property to check if set.

Return

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

Source

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;
}

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Uses	Description
wp_trigger_error()`wp-includes/functions.php`	Generates a user-level error/warning/notice/deprecation message.

Changelog

Version	Description
6.4.0	Checking a dynamic property is deprecated.
4.0.0	Introduced.

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