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upx.php文件
//上传操作
require_once "./libs/uploadx.php";
$upx = new uploadx();
$upx->uploadx_form = "swfile";
$upx->uploadx_save = "upload";
$upx->uploadx_size = "1024";
$upx->uploadx_name = time();
$upx->file();
print_r($upx->file);

?>
uploadx.php类文件
/*

使用方法:

html表单页
-------------------------------------------------------------------------

 
 

-------------------------------------------------------------------------

upload.php处理页
-------------------------------------------------------------------------
require_once "./uploadx.php";
$upx = new uploadx();
$upx->uploadx_form = "swfile";              //表单控件名称(表单上传控件的名称)
$upx->uploadx_save = "temp";                //保存文件目录(上传文件保存目录可以是相对路径也可以是绝对路径)
$upx->uploadx_type = "jpg|gif|png|swf";    //允许上传类型(根据后缀限制上传类型,每个后缀用"|"隔开) 
$upx->uploadx_size = "1024";                //允许上传大小(单位是kb。例:1024=1024kb)
$upx->uploadx_name = time();                //上传后文件名(可自定义。例:date("y-m-d",time()))

if($upx->file()){
  echo "上传成功
";
  echo "名称->".$upx->file["name"]."
";
  echo "路径->".$upx->file["path"]."
";
  echo "大小->".$upx->file["size"]."
";
  echo "类型->".$upx->file["type"]."
";
  echo "时间->".$upx->file["time"]."
";
  echo "结果->".$upx->file["info"]."
";
 
}else{
  echo $upx->file["info"];
}

 

-------------------------------------------------------------------------
*/
class uploadx {

       
       public $uploadx_form; //表单控件名称
       public $uploadx_save; //保存文件目录
       public $uploadx_type; //允许上传类型
       public $uploadx_size; //允许上传大小
       public $uploadx_name; //上传后文件名
      
       function __construct(){//初始化函数
          $this->uploadx_form = "attach";
          $this->uploadx_save = "temp";
          $this->uploadx_type = "jpg|gif|png|swf|flv|rar|7z|zip|doc|docx|ppt|pptx|xls|xlsx|txt|pdf|wav|mp3|wma|rm|rmvb|wmv";        
          $this->uploadx_size = "1024";
          $this->uploadx_info = false;
       }
      
      function mkdirs($path , $mode = 0777){
          $rootdir = "";
          if(substr($path,0,1)=="/") $rootdir = $_server["document_root"];         
          $path = $rootdir . $path;
          if(!is_dir($path)){
              $this->mkdirs(dirname($path),$mode);
              mkdir($path,$mode);
          }
          return true;
      }

 

     function file(){
              if(!isset($_files[$this->uploadx_form])){
                  $this->file = array("file"=>false,"info" => "上传错误!请检查表单上传控件名称[".$this->uploadx_form."]是否正确!");
                  return false;
              }
             
              switch($_files[$this->uploadx_form]["error"]){
                
                 case 1:
                  $this->file = array("file"=>false,"info" => "指定上传的文件大小超出服务器限制!");
                  return false;
                 break; 
                
                 case 2:
                  $this->file = array("file"=>false,"info" => "指定上传的文件大小超出表单限制!");
                  return false;
                 break; 
                                            
                 case 3:
                  $this->file = array("file"=>false,"info" => "只有部份文件被上传,文件不完整!");
                  return false;
                 break; 
                                                     
                 case 4:
                  $this->file = array("file"=>false,"info" => "您没有选择上传任何文件!");
                  return false;
              }
             
              $postfix = pathinfo($_files[$this->uploadx_form]["name"], pathinfo_extension); 
              if(stripos($this->uploadx_type,$postfix)===false){
                $this->file = array("file"=>false,"info" => "指定上传的文件类型超出限制,允许上传文件类型：".$this->uploadx_type);
                return false;
               
              }
         
              if(round($_files[$this->uploadx_form]["size"]/1024)>$this->uploadx_size){
                $this->file = array("file"=>false,"info" => "指定上传的文件超出大小限制,文件上传限制范围：".$this->uploadx_size."kb");
                return false; 
              }               
           
              if($this->mkdirs($this->uploadx_save)){             
                $this->uploadx_name = isset($this->uploadx_name) ? $this->uploadx_name.".".$postfix : $_files[$this->uploadx_form]["name"];
                if(!@move_uploaded_file($_files[$this->uploadx_form]["tmp_name"],$this->uploadx_save."/".$this->uploadx_name)){
                  $this->file = array("file"=>false,"info" => "上传文件保存过程中出现错误,请检查路径或目录权限.");
                  return false;
                }
              }else{
                 $this->file = array("file"=>false,"info" => "服务器目录不存在,自动创建目录失败,请检查是否有权限!");
                  return false;
              }                
             
              @chmod($this->uploadx_save."/".$this->uploadx_name,0777);    
              $this->file = array(
                    "file" => true,
                    "name" => $this->uploadx_name,
                    "path" => $this->uploadx_save."/".$this->uploadx_name,
                    "size" => $_files[$this->uploadx_form]["size"],
                    "type" => $postfix,
                    "time" => time(),
                    "info" => "上传成功!"
              );               
              return true;
                        
     }

}

本文来源：http://www.gdgbn.com/ps/29448/