PHP实现多图片上传类实例

本文所述为一个实用的PHP多图片文件上传类，其支持gif、jpg、jpeg、pjpeg、png格式的多图片上传功能，类中还可限制图片类型、上传图片的大小、设置上传目录、一些提交判断等功能。此外该类并不局限于图片的上传，也可以上传TXT/RAR等文件类型，只是需要对代码进行一下修改，感兴趣的读者可以自己尝试一下。

php多图片上传类完整功能代码如下：

 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 = '文件超过服务器的约定大小！';
 break;
      case 2: smfilemessage = '文件超过指定的文件大小！';
 break;
      case 3: smfilemessage = '文件只上传了部分！';
 break;
      case 4: echo "this->file_name " . '文件上传失败！
';
 break;
 }
      self :: __destruct();
      }else{
      smfiletypeflag = array_search(smfiletype, this -> file_type_array);
      // 进行真实格式验证
      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){ // 判断是否是png图片
   typeCode = intval(strInfo['chars2'] . strInfo['chars3'] . strInfo['chars4']);
   smfiletypeflag = array_search(typeCode, this -> file_type_real_array);
   if(smfiletypeflag == false){ // 判断是否是jpg图片
     $typeCode = intval(strInfo['chars7'] . strInfo['chars8'] . strInfo['chars9'] . strInfo['chars10']);
     smfiletypeflag = array_search(typeCode, this -> file_type_real_array);
     }
   }
 }
      if($smfiletypeflag == false){
 $smfilemessage = '文件类型不对，请核实！';
 self :: __destruct();
 }else{
 $resflag = $this -> move_file($this -> file_tmp_name, this -> file_name);
 if (resflag == 1){
   $smfilemessage = '文件上传成功！';
   self :: totalsize += intval($smfilesize);
   self :: __destruct();
   }else{
   $smfilemessage = '文件上传失败！';
   self :: __destruct();
   }
 }
      }
    $smfilesizeformat = $this -> size_BKM(smfilesize);
    echo '
' . smfilename . '
' . smfiletype . '
' . smfilesizeformat . '
' . smfilemessage . '
';
    }
  function move_file(mvfiletmp, mvfilename){ // 移动文件
    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单位转换
    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;
    }
  }
?>

读者可以将上述代码复制到PHP文件中，并保存文件名为：more_upload_file.class.php，在使用时include该文件即可。