如何在lighttd服务器上同时运行多个php版本？

$HTTP["url"] =~ "^/php7" {
    server.document-root = "/path/to/php7"
    fastcgi.server = (
        ".php" => (
            (
                "socket" => "/var/run/php7-fpm.sock",
                "bin-path" => "/usr/bin/php-cgi7",
                "max-procs" => 1,
                "bin-environment" => (
                    "PHP_FCGI_CHILDREN" => "4",
                    "PHP_FCGI_MAX_REQUESTS" => "10000"
                ),
                "broken-scriptfilename" => "enable"
            )
        )
    )
}

$HTTP["url"] =~ "^/php5" {
    server.document-root = "/path/to/php5"
    fastcgi.server = (
        ".php" => (
            (
                "socket" => "/var/run/php5-fpm.sock",
                "bin-path" => "/usr/bin/php-cgi5",
                "max-procs" => 1,
                "bin-environment" => (
                    "PHP_FCGI_CHILDREN" => "4",
                    "PHP_FCGI_MAX_REQUESTS" => "10000"
                ),
                "broken-scriptfilename" => "enable"
            )
        )
    )
}

sudo service lighttpd restart