简单的PHP图片上传程序

<?php  
if($_FILES['file']['error'] > 0){  
   echo '!problem:';  
   switch($_FILES['file']['error'])  
   {  
     case 1: echo '文件大小超过服务器限制';  
             break;  
     case 2: echo '文件太大！';  
             break;  
     case 3: echo '文件只加载了一部分！';  
             break;  
     case 4: echo '文件加载失败！';  
             break;  
   }  

   exit;  
}  
if($_FILES['file']['size'] > 1000000){  
   echo '文件过大！';  
   exit;  
}  
if($_FILES['file']['type']!='image/jpeg' && $_FILES['file']['type']!='image/gif'){  
   echo '文件不是JPG或者GIF图片！';  
   exit;  
}  
$today = date("YmdHis");  
$filetype = $_FILES['file']['type'];  
if($filetype == 'image/jpeg'){  
  $type = '.jpg';  
}  
if($filetype == 'image/gif'){  
  $type = '.gif';  
}  
$upfile = 'upfile/' . $today . $type;  
if(is_uploaded_file($_FILES['file']['tmp_name']))  
{  
   if(!move_uploaded_file($_FILES['file']['tmp_name'], $upfile))  
   {  
     echo '移动文件失败！';  
     exit;  
    }  
}  
else  
{  
   echo 'problem!';  
   exit;  
}  
echo '<h1>success!</h1><br>';   
echo '文件大小：' . $_FILES['file']['size'] . '字节' . '<Br>';  
echo '文件路径：' . $upfile;  
echo '<hr with="100%" />' . '<p>';  
$dirr = 'upfile/';  
$dir = opendir($dirr);  
echo $dirr . '--Listing:<ul>';  
while($file = readdir($dir)){  
  echo "<li>$file</li>";  
}  
echo '</ul>';  
closedir($dir);  
?> 

<?php  

if(empty($_GET[submit]))  

{  

?>  
<form enctype="multipart/form-data" action="<?php $_SERVER['PHP_SELF']?>?submit=1" method="post">  
Send this file: <input name="filename" type="file">  
<input type="submit" value="确定上传">  
</form>  
<?php   
}else{  
    $path="uploadfiles/";        //上传路径  

//echo $_FILES["filename"]["type"];  


if(!file_exists($path))  
{  
    //检查是否有该文件夹，如果没有就创建，并给予最高权限  
    mkdir("$path", 0700);  
}//END IF  
//允许上传的文件格式  
$tp = array("image/gif","image/pjpeg","image/png");  
//检查上传文件是否在允许上传的类型  
if(!in_array($_FILES["filename"]["type"],$tp))  
{  
    echo "格式不对";  
    exit;  
}//END IF  
if($_FILES["filename"]["name"])  
{  
        $file1=$_FILES["filename"]["name"];  
        $file2 = $path.time().$file1;  
        $flag=1;  
}//END IF  
if($flag) $result=move_uploaded_file($_FILES["filename"]["tmp_name"],$file2);  
//特别注意这里传递给move_uploaded_file的第一个参数为上传到服务器上的临时文件  
if($result)  
{  
    //echo "上传成功!".$file2;  
    echo "<script language='javascript'>";  
    echo "alert(\"上传成功！\");";  
    echo " location='add_aaa.php?pname=$file2'";  
    echo "</script>";  
}//END IF  


}  

?>