WordPress Version: 6.4
/**
* Determines whether the server is running an earlier than 1.5.0 version of lighttpd.
*
* @since 2.5.0
*
* @return bool Whether the server is running lighttpd < 1.5.0.
*/
function is_lighttpd_before_150()
{
$server_parts = explode('/', isset($_SERVER['SERVER_SOFTWARE']) ? $_SERVER['SERVER_SOFTWARE'] : '');
$server_parts[1] = isset($server_parts[1]) ? $server_parts[1] : '';
return 'lighttpd' === $server_parts[0] && -1 === version_compare($server_parts[1], '1.5.0');
}