$file_name = “info_check.exe”;
  $file_dir = “/public/www/download/”;
  if (!file_exists($file_dir . $file_name)) { //检查文件是否存在
  echo “文件找不到”;
  exit;
  } else {
  $file = fopen($file_dir . $file_name,”r”); //打开文件
  //输入文件标签
  Header(“Content-type: application/octet-stream”);
  Header(“Accept-Ranges: bytes”);
  Header(“Accept-Length: “.filesize($file_dir . $file_name));
  Header(“Content-Disposition: attachment; filename=” . $file_name);
  //输出文件内容
  echo fread($file,filesize($file_dir . $file_name));
  fclose($file);
  exit;}
  而如果文件路径是”http”或者”ftp”网址的话,则源代码会有少许改变,程序如下:
  $file_name = “info_check.exe”;
  $file_dir = “www.easycn.net/”;
  $file = @ fopen($file_dir . $file_name,”r”);
  if (!$file) {
  echo “文件找不到”;
  } else {
  Header(“Content-type: application/octet-stream”);
  Header(“Content-Disposition: attachment; filename=” . $file_name);
  while (!feof ($file)) {
  echo fread($file,50000);
  }
  fclose ($file);
  }
  这样就可以用PHP直接输出文件了。