Tiny HTTP Server in PHP

server.php

#!/usr/bin/env php -q
<?php

/**
* Copied with minor fixes from: http://www.jezra.net/blog/proof_of_concept_webserver_written_in_PHP
*/

date_default_timezone_set('America/New_York');

//function get_include_contents
// input : path to a php file
// output : the parsed text of the php file
function get_include_contents($filename)
{
 echo "parsing: $filename";
 if (is_file($filename))
 {
  ob_start();
  include $filename;
  $contents = ob_get_contents();
  ob_end_clean();
  return $contents;
 }
 return false;
}

function get_file_extension($file)
{
    $path_parts = pathinfo($file);
    return $path_parts['extension'];
}
function get_path_to_file($request)
{
 global $pwd;
 global $default_http_dir;
 return $pwd."/".$default_http_dir.$request;
}
function get_referer($text)
{
 preg_match("/10000(/S*)/i",$text,$matches);
 $referer = $matches[1];
 return $referer;
}


echo"starting server...\n";
//we want to run indefinitely
set_time_limit(0);
//we need to output info to the terminal as soon as we can
ob_implicit_flush();
//define a bunch of variables
//what address are we binding to?
$bind_address='127.0.0.1';
//access port
$port=88888;
//what is the default file?
$default_array= array("index.php","index.htm","index.html");
//set the default dir for files
$default_http_dir = "webroot";
//where are we?
$pwd=trim(`pwd`);

//start connecting sockets
$socket_resource=socket_create(AF_INET,SOCK_STREAM,0) or die("socket_create()failed.");
socket_bind($socket_resource,$bind_address,$port) or die("socket_bind()failed");
socket_listen($socket_resource,5) or die("socket_listen()failed");
echo "Server is up and running ....\n";
do //this is the MAIN loop
{
 if(($accept_socket_resource=socket_accept($socket_resource))<0)
 {
  echo "socket_accept() failedn";
  break;
 }
 if(FALSE===($buffer_text=socket_read($accept_socket_resource,2048)))
 {
  echo "socket_read() failedn";
  break;
 }
 preg_match("/ .+ /i",$buffer_text,$matches);
 $full_request = trim($matches[0]);
 $request_and_arguments = explode("?",$full_request);
 $request = urldecode( $request_and_arguments[0] );
 $arguments = (empty($request_and_arguments) || empty($request_and_arguments[1])) ? Null : $request_and_arguments[1];
 $arguments = FALSE;
 // if we have some get vars, lets make a $_GET[] array set
 if($arguments)
 {
  $args_n_vars = explode("&",$arguments);
  foreach($args_n_vars as $arg_n_var)
  {
   list($var,$value) = explode("=",$arg_n_var);
   $_GET[$var]=urldecode($value);
   
  }
 
 }
 
 if(substr($request,strlen($request)-1,1)=="/")
 {
  //find the first default file
  foreach($default_array as $default_file)
  {
   $tfile = stripslashes($pwd)."/".$default_http_dir."/".$default_file;
   if( file_exists($tfile) ) 
   {
    $request = "/$default_file";
    break;
   }
  } 
 }
 
 $file_extension = get_file_extension($request);
 echo "Detected extension: $file_extension";
 $path_to_file = get_path_to_file($request);
 //what mime type should be returned?
 switch($file_extension)
 {
  case "png":
   $mime="image/png";
   break;
  case "gif":
   $mime="image/gif";
   break;
  case "jpg":
   $mime="image/jpeg";
   break;
  case "zip":
   $mime="aplication/zip";
   break;
  case "exe":
   $mime="aplication/exe";
   break;
  case "bmp":
   $mime="image/bmp";
   break;
  case "mov":
   $mime="video/quicktime";
   break;
  case "mp3":
   $mime="video/mpeg";
   break;
  case "mpeg":
   $mime="video/mpeg";
   break;
  case "txt":
   $mime="text/plain";
   break;
  default:
   $mime="text/html";
   break;
 }
 if(file_exists($path_to_file))
 {
  //we have a file to return to the user
  $return_file = true;
  //is this a php file?
  if($file_extension == "php")
  {
   echo "Found PHP file!";
   //we had better parse the php
   //where are we now?
   $start_dir= getcwd();
   //cd to the php files dir
   $php_file_dir = dirname( $path_to_file);
   $php_file = basename( $path_to_file );
   chdir($php_file_dir);
            //run the included PHP file
   $file_contents = get_include_contents("$php_file");
   $file_length=strlen($file_contents);
   //return to the start dir
   chdir($start_dir);
   
  }else{
   echo "serving: $path_to_file";
   $file_contents = file_get_contents($path_to_file);
   $file_length=filesize($path_to_file);
  }
  if($return_file)
  {
   $today=date("m.d.y");
   $output="HTTP/1.0 200 OKrnServer: PHP Proof of ConceptrnDate:$today\r\nConnection:close\r\nContent-Length:$file_length\r\nContent-Type:$mime\r\n\r\n";
   socket_send($accept_socket_resource,$output,strlen($output),0);
   $start_chunk=0;
   while($start_chunk<=$file_length)
   {
    $text_chunk=substr($file_contents,$start_chunk,2048);
    socket_write($accept_socket_resource,$text_chunk,strlen($text_chunk));
    $start_chunk+=2048;
   }
  }
 }else{
  $output="HTTP/1.0 404 OBJECT NOT FOUND\r\nServer: PHP ServerrnConnection: closern\r\n";
  socket_write($accept_socket_resource,$output,strlen($output));
 }
 socket_close($accept_socket_resource);
}while(true);
socket_close($socket_resource);