PHP upload script works locally, however not on remote server - php

Question

It's strange, this script works locally (on MAMP), but not on my remote server (Bluehost). I tried adding some POST data, and that worked, however the file upload isn't working at all. Any ideas?
//upload file
if ((($_FILES["file"]["type"] == "image/gif") || ($_FILES["file"]["type"] == "image/jpeg") || ($_FILES["file"]["type"] == "image/jpg") || ($_FILES["file"]["type"] == "image/pjpeg")) && ($_FILES["file"]["size"] < 2000000) && isSet($_FILES["file"])){
if ($_FILES["file"]["error"] > 0){
echo "<div class='error'>Return Code: " . $_FILES["file"]["error"] . "</div>";
}else{
if (file_exists("../upload/" . $_FILES["file"]["name"])){
echo "<div class='error'>" . $_FILES["file"]["name"] . " already exists. </div>";
}else{
move_uploaded_file($_FILES["file"]["tmp_name"],
"../upload/" . $_FILES["file"]["name"]);
}
}
}else{
if((($_FILES["file"]["type"] == "image/gif") || ($_FILES["file"]["type"] == "image/jpeg") || ($_FILES["file"]["type"] == "image/jpg") || ($_FILES["file"]["type"] == "image/pjpeg"))){
//echo "<div class='error'>Invalid file</div>";
}else{
if(isSet($_FILES["file"]["type"]) && !isSet($message)){
echo "<div class='error'>Invalid file type.</div>";
}
}
}
Here is the upload form.
<form action="index.php" method="post" enctype="multipart/form-data">
<div>
<input type="file" name="file" id="file" />
<input type="submit" id="submit" value="Submit" />
</div>
</form>
The upload folder's permissions are set to "775".
I'd appreciate any help/ideas.
Update
Problem solved. It was a php.ini issue. I'm not sure where the problem was exactly. However, when I restored the default php.ini, file it worked.

Answer 1

I think problems is with the read-write-execute permission of the upoading folder in server. Make sure that the destination folder have read-write-execute(777) permissions.