WordPress at a glance
function is not described

WP_Query::__get() public WP 4.0.0

Make private properties readable for backward compatibility.

It's a method of the class: WP_Query{}

No Hooks.

Return

Mixed. Property.

Usage

$WP_Query = new WP_Query();
$WP_Query->__get( $name );
$name(string) (required)
Property to get.

Changelog

Since 4.0.0 Introduced.

Code of WP_Query::__get() WP 5.5.1

<?php
public function __get( $name ) {
	if ( in_array( $name, $this->compat_fields, true ) ) {
		return $this->$name;
	}
}