PHP教程.應用實例7

PHP實現文件安全下載
程序如下:
  $file_name = "info_check.exe";
  $file_dir = "/public/www/download/";
  if (!file_exists($file_dir . $file_name)) { //檢查文件是否存在
  echo "文件找不到";
  exit;
  } else {
  $file = fopen($file_dir . $file_name,"r"); //打開文件
  //輸入文件標簽
  Header("Content-type: application/octet-stream");
  Header("Accept-Ranges: bytes");
  Header("Accept-Length: ".filesize($file_dir . $file_name));
  Header("Content-Disposition: attachment; filename=" . $file_name);
  //輸出文件內容
  echo fread($file,filesize($file_dir . $file_name));
  fclose($file);
  exit;}
  而如果文件路徑是"http"或者"ftp"網址的話,則源代碼會有少許改變,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);
  }
  這樣就可以用PHP直接輸出文件瞭

You May Also Like