php檔案下傳、上傳

php檔案上傳、下載

以前一直在做java，最近轉行去搞php開發，總覺得力不從心。這幾天有個需求，是關於php的檔案上傳和下載的。給大家分享下自己的學習資料。

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1.先來個請求頁面upload.html

  Administration - upload new files
Upload new news files

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2.php處理用戶端請求的資料upload.html

  Uploading...
Uploading file...
 0)  {    echo 'Problem: ';    switch ($_FILES['userfile']['error'])    {      case 1:echo 'File exceeded upload_max_filesize';  break;      case 2:echo 'File exceeded max_file_size';  break;      case 3:echo 'File only partially uploaded';  break;      case 4:echo 'No file uploaded';  break;  case 6:   echo 'Cannot upload file: No temp directory specified.';  break;  case 7:   echo 'Upload failed: Cannot write to disk.';  break;    }    exit;  }  // Does the file have the right MIME type?  if ($_FILES['userfile']['type'] != 'text/plain')  {    echo 'Problem: file is not plain text';    exit;  }  // put the file where we'd like it  $upfile = '/uploads/'.$_FILES['userfile']['name'];  if (is_uploaded_file($_FILES['userfile']['tmp_name']))   {     if (!move_uploaded_file($_FILES['userfile']['tmp_name'], $upfile))     {        echo 'Problem: Could not move file to destination directory';        exit;     }  }   else   {    echo 'Problem: Possible file upload attack. Filename: ';    echo $_FILES['userfile']['name'];    exit;  }  echo 'File uploaded successfully

';   // reformat the file contents  $fp = fopen($upfile, 'r');  $contents = fread ($fp, filesize ($upfile));  fclose ($fp);   $contents = strip_tags($contents);  $fp = fopen($upfile, 'w');  fwrite($fp, $contents);  fclose($fp);  // show what was uploaded  echo 'Preview of uploaded file contents:
';  echo $contents;  echo '
';?>

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3.php檔案下載

?總的來說，上面的3個程式碼片段只是簡單介紹了php檔案的上傳下載，還有很多問題要解決，就例如上傳大檔案的時候怎麼處理，批量上傳、大檔案下載等等問題。當然跟java一樣，php也有很多架構可以解決這方面。

