我上传图片或留言时出现:
这是上传图片：Warning: copy(photo/06.gif):failed to open stream: Permission denied id /goodsreg.php on line 24
当我留言时出现:Warning: fopen(book/data/online.txt): failed to open stream: Permission denied in /home/free/hjch/china/book1.php on line 404
Warning: rewind(): supplied argument is not a valid stream resource in /home/free/hjch/china/book1.php on line 405
当然这些都是在显示或上传时出现的，请高手来帮帮我啊￣

上传图片的代码是:
if ($photo)
{
if (($photo_type== "image/pjpeg")OR($photo_type == "image/gif"))
{
$photodir="photo/";
if(!(file_exists($photodir)and is_dir($photodir)))
{
mkdir($photodir,0700);
}
copy($photo,$photodir.$photo_name);
}
else{
echo "<script language=javascript>alert('上传照片只能是JPG或者GIF！');history.go(-1)</script>";
exit;
}