php 图片上传代码例子

if($_FILES['file']){

// 上传设置
$maxsize=10002400; //最大允许上传的文件大小
$alltype=array(".jpg",".JPG",".GIF",".gif",".png",".swf"); //所有允许上传的文件类型
$imgtype=array(".jpg",".JPG",".GIF",".gif",".png",".swf"); //图片类型

// 判断文件大小
if($_FILES['file']['size']>$maxsize) {
echo "您上传的资料大于10000K";
exit;
}

// 判断文件类型
$type=strstr($_FILES['file']['name'],".");
if(!in_array($type,$alltype)){
echo "不允许上传该类型的文件";
exit;
}
$updir="uploaddir";
$time=date("Ymd-His",time());
$fn=$time.$type;
$destination=$updir."//m.sbmmt.com/m/".$fn;
if(@move_uploaded_file($_FILES['file']['tmp_name'], $destination)){
@chmod($destination, 0777);
$fileurl=$updir."//m.sbmmt.com/m/".$destination;
$fileurl="".$destination;

}else{
echo "上传失败!";
echo "";
}
// ----------------------------------------------------------------------------------------------//
}
if($back=="no"):
echo "ok";
exit;
endif;