move_uploaded_file() does not work - php

Question

I run my test php project on local computer using XAMPP. I have a form where user can browse image from their computer and upload to my database.
I use move_uploaded_file() function to move image to desired folder. The script runs without error but no image was moved to desired folder. It does not echo error message if move_uploaded_file() failed. Here is my code:
$upload_dir= 'uploads';
for($i=0; $i < count($_FILES['file']['tmp_name']);$i++){
if(!empty($_FILES['file']['name'][$i])){
$temp = explode(".", $_FILES["file"]["name"][$i]);
$extension = end($temp);
$allowedExts = array("gif", "jpeg", "jpg", "png");
if(!in_array($extension, $allowedExts)){
echo "Only image ending with .jpg, .jpeg, .gif, .png is allowed";
}
// copy the file to the specified dir
else{
$name[$i] = sha1(microtime()) . "." . $extension;
if(move_uploaded_file($_FILES['file']['tmp_name'][$i],$upload_dir.'/'.$name[$i])){
$image_path_array[$i]=$upload_dir.'/'.$name[$i];
}
else{
/*** an error message ***/
echo "error with move_uploaded_file";
}
}
}
}

Answer 1

Neither of your echo statements is likely to work that way. It should be
echo "error with move_uploaded_file";
No "=" sign.
Also, are you sure your web server has permission to write into the upload directory?

Answer 2

Try this:
1) I think you should give full directory path to your $upload_dir variable something like this:
$upload_dir=$_SERVER['DOCUMENT_ROOT']."/uploads";
2)Yes the echo that you have given for display "error with move_uploaded_file" need to correct other wise it will give syntax error:
//an error message
echo "error with move_uploaded_file";
I hope this fix your problem :)

Answer 3

You should have separate move_uploaded_files() function for image on server and image on client machine.
Image from client machine will be uploaded to your server temp folder
Image on online server will be fetched as url to that image