_preload_old_requests_classes_and_interfaces( string $to )

1688function _preload_old_requests_classes_and_interfaces( $to ) {1689	global $_old_requests_files, $wp_filesystem, $wp_version;1690 1691	/*1692	 * Requests was introduced in WordPress 4.6.1693	 *1694	 * Skip preloading if the website was previously using1695	 * an earlier version of WordPress.1696	 */1697	if ( version_compare( $wp_version, '4.6', '<' ) ) {1698		return;1699	}1700 1701	if ( ! defined( 'REQUESTS_SILENCE_PSR0_DEPRECATIONS' ) ) {1702		define( 'REQUESTS_SILENCE_PSR0_DEPRECATIONS', true );1703	}1704 1705	foreach ( $_old_requests_files as $name => $file ) {1706		// Skip files that aren't interfaces or classes.1707		if ( is_int( $name ) ) {1708			continue;1709		}1710 1711		// Skip if it's already loaded.1712		if ( class_exists( $name ) || interface_exists( $name ) ) {1713			continue;1714		}1715 1716		// Skip if the file is missing.1717		if ( ! $wp_filesystem->is_file( $to . $file ) ) {1718			continue;1719		}1720 1721		require_once $to . $file;1722	}1723}