php文件上传简单实例

echo'

function uploadfile($inputname)
{
$immediate=$_get['immediate'];
$attachdir='../pictures';//上传文件保存路径，结尾不要带/
$urldir="../pictures";
$dirtype=2;//1:按天存入目录 2:按月存入目录 3:按扩展名存目录 建议使用按天存
$maxattachsize=2097152;//最大上传大小，默认是2m
$upext='txt,rar,zip,jpg,jpeg,gif,png,swf,wmv,avi,wma,mp3,mid,jar,jad,exe,html,htm,css,js,doc';//上传扩展名

$err = "";
$msg = "";
$upfile=$_files[$inputname];
if(!empty($upfile['error']))
{
switch($upfile['error'])
{
case '1':
$err = '文件大小超过了php.ini定义的upload_max_filesize值';
break;
case '2':
$err = '文件大小超过了html定义的max_file_size值';
break;
case '3':
$err = '文件上传不完全';
break;
case '4':
$err = '无文件上传';
break;
case '6':
$err = '缺少临时文件夹';
break;
case '7':
$err = '写文件失败';
break;
case '8':
$err = '上传被其它扩展中断';
break;
case '999':
default:
$err = '无有效错误代码';
}
}
elseif(empty($upfile['tmp_name']) || $upfile['tmp_name'] == 'none')$err = '无文件上传';
else
{
$temppath=$upfile['tmp_name'];
$fileinfo=pathinfo($upfile['name']);
$extension=$fileinfo['extension'];
if(preg_match('/'.str_replace(',','|',$upext).'/i',$extension))
{
$filesize=filesize($temppath);
if($filesize > $maxattachsize)$err='文件大小超过'.$maxattachsize.'字节';
else
{
switch($dirtype)
{
case 1: $attach_subdir = 'day_'.date('ymd'); break;
case 2: $attach_subdir = 'month_'.date('ym'); break;
case 3: $attach_subdir = 'ext_'.$extension; break;
}
$attach_dir = $attachdir.'/'.$attach_subdir;
if(!is_dir($attach_dir))
{
@mkdir($attach_dir, 0777);
@fclose(fopen($attach_dir.'/index.htm', 'w'));
}
php_version $filename=date("ymdhis").mt_rand(1000,9999).'.'.$extension;
$target = $urldir.'/'.$attach_subdir.'/'.$filename;

move_uploaded_file($upfile['tmp_name'],$target);
if($immediate=='1')$target='!'.$target;
$msg=str_replace('../',"",$target);
}
}
else $err='上传文件扩展名必需为：'.$upext;

@unlink($temppath);
}
return array('err'=>$err,'msg'=>$msg);
}
?>