php上传文件类

<?php
/*
*多文件上传
*/
  function upload($controlName,$uploadPath)
  {
   foreach($_FILES[$controlName]['tmp_name'] as $k=>$v)
   {
    //判断上传是否为空
    if($v!="")
    {
    //判断大小和类型
     $r=checkUpload($_FILES[$controlName]['size'][$k],$_FILES[$controlName]['type'][$k],$_FILES[$controlName]['name'][$k]);
           if($r['error']===0)
     {
     echo $r['msg']."<br>";
     echo $r['name']."<br>";
     }
     else
     {
     if(!is_dir($uploadPath."/".date("Y_m_d")))
     {
     mkdir($uploadPath."/".date("Y_m_d"));
     }
     $arrExt=explode(".",$_FILES[$controlName]['name'][$k]);
     $extName=$arrExt[count($arrExt)-1];
     $newName=$uploadPath."/".date("Y_m_d")."/".sha1(microtime()).".".$extName;
     if(move_uploaded_file($v,$newName))
     {
        $arrName[]=$newName;
     }
     }
    }
   }
   return $arrName;
  }
  /*
  *判断文件大小和类型
  */
  function checkUpload($size,$type,$name)
  {
      if($size>5242880)
   {
    $result['msg']='文件太大！';
    $result['name']="错误文件：".$name;
    $result['error']=0;
   }
  
   $arrayType=array("image/pjpeg","image/x-png","image/gif","application/msword","application/vnd.ms-powerpoint","application/vnd.ms-excel",);
   if(!in_array($type,$arrayType))
   {
    $result['msg']='文件类型不正确！';
    $result['name']="错误文件：".$name;
    $result['error']=0;  
   }
   return $result;
  }
?>