run php on node js server

1var http = require("http"),
2fs = require("fs"),
3path = require("path"),
4url = require("url"),
5runner = require("child_process");
6
7function sendError(errCode, errString, response)
8{
9  response.writeHead(errCode, {"Content-Type": "text/plain;charset=utf-8"});
10  response.write(errString + "\n");
11  response.end();
12  return false;
13}
14
15function sendData(err, stdout, stderr, response)
16{
17  if (err) return sendError(500, stderr, response);
18  response.writeHead(200,{"Content-Type": "text/plain;charset=utf-8"});
19  response.write(stdout);
20  response.end();
21}
22
23function runScript(exists, file, param, response)
24{
25  if(!exists) return sendError(404, 'File not found', response);
26  runner.exec("php " + file + " " + param,
27   function(err, stdout, stderr) { sendData(err, stdout, stderr, response); });
28}
29
30function php(request, response)
31{
32  var urlpath = url.parse(request.url).pathname;
33  var param = url.parse(request.url).query;
34  var localpath = path.join(process.cwd(), urlpath);
35  fs.exists(localpath, function(result) { runScript(result, localpath, param, response)});
36}
37
38var server = http.createServer(php);
39server.listen(1000);
40console.log("PHP ready to run script given on port 1000.");