PHP實現多圖片上傳類執行個體_php技巧

本文所述為一個實用的PHP多圖片檔案上傳類，其支援gif、jpg、jpeg、pjpeg、png格式的多圖片上傳功能，類中還可限制圖片類型、上傳圖片的大小、設定上傳目錄、一些提交判斷等功能。此外該類並不局限於圖片的上傳，也可以上傳TXT/RAR等檔案類型，只是需要對代碼進行一下修改，感興趣的讀者可以自己嘗試一下。

php多圖片上傳類完整功能代碼如下：

<?phpclass more_file_upload{  const FILE_PATH = '/uploadfile/'; //預設檔案上傳的目錄，請自行修改  var file_type;  var file_type_array;  var file_type_real_array;  var file_type_string;  var file_name;  var file_size;  var file_tmp_name;  var file_error;  var handledate;  static totalsize = 0;  function __construct(file_name, file_error, file_size, file_tmp_name, file_type){    this -> handledate = date('m-d-Y');    if (!empty(file_name)){      this -> file_name = file_name;      this -> file_error = file_error;      this -> file_size = file_size;      this -> file_tmp_name = file_tmp_name;      this -> file_type = file_type;      this -> file_type_array = array('/', 'image/gif', 'image/jpg', 'image/jpeg', 'image/pjpeg', 'image/png');      this -> file_type_real_array = array(0.1, 'jpg' => 74707370, 'gif' => 7173, 'bmp' => 6677, 'png' => 807871);      this -> show_execute_message(this -> file_error, this -> file_name, this -> file_type, this -> file_size);      }    }  function __destruct(){    this -> file_name = NULL;    this -> file_error = NULL;    this -> file_size = NULL;    this -> file_tmp_name = NULL;    this -> file_type = NULL;    self :: totalsize = 0;    }  function show_execute_message(smfileerror, smfilename, smfiletype, smfilesize){    if(smfileerror > 0){      switch (smfileerror){      case 1: smfilemessage = '<strong>檔案超過伺服器的約定大小！</strong>';        break;      case 2: smfilemessage = '<strong>檔案超過指定的檔案大小！</strong>';        break;      case 3: smfilemessage = '<strong>檔案只上傳了部分！</strong>';        break;      case 4: echo "this->file_name " . '檔案上傳失敗！<br/>';        break;        }      self :: __destruct();      }else{      smfiletypeflag = array_search(smfiletype, this -> file_type_array);      // 進行真實格式驗證      if(smfiletypeflag != false){        file = fopen(this -> file_tmp_name, "rb");        bin = fread(file, 10);        fclose(file);        strInfo = @unpack("c10chars", bin);        typeCode = intval(strInfo['chars1'] . strInfo['chars2']);        smfiletypeflag = array_search(typeCode, this -> file_type_real_array);        if(smfiletypeflag == false){ // 判斷是否是png圖片          typeCode = intval(strInfo['chars2'] . strInfo['chars3'] . strInfo['chars4']);          smfiletypeflag = array_search(typeCode, this -> file_type_real_array);          if(smfiletypeflag == false){ // 判斷是否是jpg圖片            $typeCode = intval(strInfo['chars7'] . strInfo['chars8'] . strInfo['chars9'] . strInfo['chars10']);            smfiletypeflag = array_search(typeCode, this -> file_type_real_array);            }          }        }      if($smfiletypeflag == false){        $smfilemessage = '<strong>檔案類型不對，請核實！</strong>';        self :: __destruct();        }else{        $resflag = $this -> move_file($this -> file_tmp_name, this -> file_name);        if (resflag == 1){          $smfilemessage = '檔案上傳成功！';          self :: totalsize += intval($smfilesize);          self :: __destruct();          }else{          $smfilemessage = '<strong>檔案上傳失敗！</strong>';          self :: __destruct();          }        }      }    $smfilesizeformat = $this -> size_BKM(smfilesize);    echo '<tr><td align="left" >' . smfilename . '</td><td align="center" >' . smfiletype . '</td><td align="center" >' . smfilesizeformat . '</td><td align="center" >' . smfilemessage . '</td></tr>';    }  function move_file(mvfiletmp, mvfilename){ // 移動檔案    mvfilenamearr = explode('.', basename(mvfilename));    mvfilenamearr[0] = this -> rand_string();    mvfilename = implode('.', mvfilenamearr);    if (is_uploaded_file(mvfiletmp)){      uploadfile = self :: FILE_PATH . "mvfilename";      result = move_uploaded_file(mvfiletmp, uploadfile);      return result;      }    }  function rand_string(){    string = md5(uniqid(rand() . microtime()));    return string;    }  function size_BKM(size){ // B/KB/MB單位轉換    if(size < 1024)    {      size_BKM = (string)size . " B";      }    elseif(size < (1024 * 1024))      {      size_BKM = number_format((double)(size / 1024), 1) . " KB";      }else      {      size_BKM = number_format((double)(size / (1024 * 1024)), 1) . " MB";      }    return size_BKM;    }  }?>

讀者可以將上述代碼複製到PHP檔案中，並儲存檔案名稱為：more_upload_file.class.php，在使用時include該檔案即可。