仅仅实现一个小的上传功能，并没有过多注意代码的质量

html

   
 
 
   
   
 upload new file to website
      

	     

		    
			upload a file :
			
			
		 
	  

   

 0)
   {
      echo "upload error"."
";
	  exit;
   }
   else
   {
      echo "upload ok"."
";
   }

   if(file_exists("/var/www/".$_FILES['userfile']['name']))
   {
      echo "file  already exists"."
";
	  exit;
   }
   else
   {
     move_uploaded_file($_FILES['userfile']['tmp_name'], "/var/www/".$_FILES['userfile']['name']); //必须修改上传文件名，否则脚本退出会自动删除上传文件
	 echo "upload finished
";
   }
?>

注意：php.ini文件中有关上传的参数配置

file_uploads, upload_tmp_dir, upload_max_filesize, post_max_size