Tests whether wp_version_check is blocked.

It’s possible to block updates with the wp_version_check filter, but this can’t be checked during an Ajax call, as the filter is never introduced then.

This filter overrides a standard page request if it’s made by an admin through the Ajax call with the right query argument to check for this.

File: wp-admin/includes/class-wp-site-health.php. View all references

public function check_wp_version_check_exists() {
	if ( ! is_admin() || ! is_user_logged_in() || ! current_user_can( 'update_core' ) || ! isset( $_GET['health-check-test-wp_version_check'] ) ) {
		return;
	}

	echo ( has_filter( 'wp_version_check', 'wp_version_check' ) ? 'yes' : 'no' );

	die();
}