ore Photo Gallery Problems

[camdes]

I have got my photo gallery working on my test server which is running PHP version 5.2.5. When I try to run it on my remote server it will not run. My Host provider is running PHP version 4.4.6. I have set all the other parameters i.e. Post_Max_Size and File_Upload_Size on my test server to the same as my host (2M).
I have two sets of uploads. One of them is for a thumbnail depicting an album. Here the photograph is uploaded and the thumbnail created and stored in an album directory. The large file is then deleted. That upload works fine.
For the second upload, the photograph is uploaded, resized to 500 px wide and stored in an image directory. That image is then resized again to create the thumbnail and stored in a thumbnail directory. Even if I use the same photograph for the second upload as for the first I get an error back that uploaded file has zero length.
I know I am asking a lot from the server, but no matter how hard I try, I cannot get the staff at the school to resize the photographs before uploading them.

Can anyone suggest why I am having these problems on my host server.

[leatherback]

hm.. could you post your scripts? I thought it could be a memory issue at first, but as you create a thumbnail, it probably isn't. Have you possibly set your resizing function to delete the uploaded file after resizing? In that case when you create a thumbnail after creating the album image, there woul dnot be an uploaded file.

You could try and create a thumbnail from the file in the album, and see whether that helps

[camdes]

Here is my code for uploading the files. I have tried commenting out the create thumbnail part and the smaller image part in turn and I still get the same error.
The next code is the upload code for a thumbnail depicting an album and this works alright. Any help would be apreciated.

<?php
$uploadid = $_SESSION['loginID'];
$uploaddate = date("j-n-y, G:i:s");

$uploadedfile=$_FILES['userfile']['tmp_name'];

$ph_category=$_POST['category'];
$ph_caption=$_POST['caption'];

if ($ph_category == "Select Category") {
	echo ("You have not selected a category for this photograph<BR>\n");
	exit;
}

//check to see if a file is uploaded at all

if ($userfile_size >= 2000000) {
echo ("This file is too large<BR>\n");
echo ("Please reduce the resolution or size of photograph<BR>\n");
echo ("The file size must be below 2 megabytes and try again<BR>\n");
exit;
}

//check for empty file
echo ("filesize: $userfile_size<BR>\n");

if ($userfile_size==0)
{
echo "Error: File uploaded has no image";
exit;
}

// create new name for file
$randomnumber = rand();
$date = date("Gis");
$newname = $date . $randomnumber;
//echo ("name: $newname<BR>\n");

$src = imagecreatefromjpeg($uploadedfile);

list($width,$height)=getimagesize($uploadedfile);
if ($width > $height) {
$newwidth=500;
$newheight=($height/$width)*500;
}
if ($width < $height)	{
	$newheight=375;	
	$newwidth=($width/$height)*375;
}

$tmp=imagecreatetruecolor($newwidth,$newheight);
imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height);
$filename= "../gallery/".$newname. ".jpg";
imagejpeg($tmp,$filename,100);

if ($width > $height) {
$thwidth=100;
$thheight=($height/$width)*100;
}
if ($width < $height)	{
	$thheight=75;	
	$thwidth=($width/$height)*75;
}
$tmp_th=imagecreatetruecolor($thwidth,$thheight);
imagecopyresampled($tmp_th,$src,0,0,0,0,$thwidth,$thheight,$width,$height);
$thumbname= "../gallery/thumbs/".$newname. ".jpg";
imagejpeg($tmp_th,$thumbname,100);

echo ("filename: $filename<BR>\n");
echo ("thumbnail: $thumbname<BR>\n");


$query = "INSERT INTO gallery_photos  (photo_filename, photo_thumbnail, photo_caption, photo_category, upload_id, upload_date )". "VALUES ('$filename','$thumbname','$ph_caption', '$ph_category','$uploadid','$uploaddate')";

 //echo ("The query is: <BR>$query<P>\n");

 if (mysql_db_query ($dbname, $query, $link)){
		echo ("Your Photograph was successfully uploaded!<BR>\n");
 } else {
echo(mysql_error());
	echo ("Your photograph could not be uploaded.<BR>\n");
 }
 mysql_close ($link); 
?>

code for uploading the album image (this works)

<?php
$uploadid = $_SESSION['loginID'];
$uploaddate = date("j-n-y, G:i:s");

$uploadedfile=$_FILES['cat_file']['tmp_name'];

$category=$_POST['cat_name'];

//check to see if a file is uploaded at all

if ($cat_file_size >= 2000000) {
echo ("This file is too large<BR>\n");
echo ("Please reduce the resolution or size of photograph<BR>\n");
echo ("The file size must be below 2 megabytes and try again<BR>\n");
exit;
}

$albumname="../gallery/albums/$cat_file_name";

//check for empty file
echo ("filesize: $cat_file_size<BR>\n");

if ($cat_file_size==0)
{
echo "Error: File uploaded has no image";
exit;
}

// create new name for file
$randomnumber = rand();
$date = date("Gis");
$newname = $date . $randomnumber;
echo ("name: $newname<BR>\n");

$src = imagecreatefromjpeg($uploadedfile);

list($width,$height)=getimagesize($uploadedfile);
if ($width > $height) {
$newwidth=80;
$newheight=($height/$width)*80;
}
if ($width < $height)	{
	$newheight=60;	
	$newwidth=($width/$height)*60;
}
$tmp=imagecreatetruecolor($newwidth,$newheight);
imagecopyresampled($tmp,$src,0,0,0,0,$newwidth,$newheight,$width,$height);
$filename= "../gallery/albums/".$newname. ".jpg";
imagejpeg($tmp,$filename,100);

$query = "INSERT INTO gallery_category  (category, cat_image, description, upload_id, upload_date )". "VALUES ('$category','$filename', '$description', '$uploadid', '$uploaddate')";

 //echo ("The query is: <BR>$query<P>\n");

 if (mysql_db_query ($dbname, $query, $link)){
		echo ("Your Album was successfully created!<BR>\n");
 } else {
echo(mysql_error());
	echo ("Your Album could not be created.<BR>\n");
 }
 mysql_close ($link);
?>