GSA Proxy Scraper - web-export script in php

<?php
  // GSA Proxy Scraper - web-export script in php
  // http://www.proxy-scraper.com/

  //where should the data be saved?
  $save_file="./proxies.txt";

  //whats the variable name of the file used in POST/GET header?
  $parameter="file";

  //----------------------------------------------------------------------------

  //check if there are data in $_FILES
  if(count($_FILES)>0) {
    if (move_uploaded_file($_FILES[$parameter]['tmp_name'], $save_file)) {
      echo 'File saved to "'.$save_file.'".';
    } else {
      header($_SERVER["SERVER_PROTOCOL"]." 400 Bad Request");
      echo 'Unable to save file to "'.$save_file.'".'."\n";
      echo "More debug data follow:\n";
      print_r($_FILES);
    }
  } else {
    if(isset($_POST[$parameter])) { $data=$_POST[$parameter]; }
    elseif(isset($_GET[$parameter])) { $data=$_GET[$parameter]; }
    if($data!="") {
      $fp=fopen($save_file,"w");
      if(!$fp) {
        header($_SERVER["SERVER_PROTOCOL"]." 400 Bad Request");
        echo 'Unable to save file to "'.$save_file.".\n";
      } else {
        fwrite($fp,$data);
        fclose($fp);
        echo 'Data saved to "'.$save_file.'".';
      }
    } else {
      header($_SERVER["SERVER_PROTOCOL"]." 400 Bad Request");
      echo 'No content defined in "'.$parameter.".\n";
    }
  }
?>