How to rename an uploaded file so that it is unique? - php

Question

I have an upload form on a site that uploads multiple files to a server, and also sends me an email.
It is written in php, with the main file part being the following:
if (isset($_FILES) && (bool) $_FILES) {
$files = array();
$ext_error = "";
// Define allowed extensions
// blahblahblah checking
// Store attached files in uploads folder
$server_file = dirname(__FILE__) . "/uploads/" . $path_part['basename'];
move_uploaded_file($temp_name, $server_file);
array_push($files, $server_file);
Nowadays, people upload pictures from a cell phone and often they are all named the same file name: image.jpg (or something similar) - so they get overwritten.
I would like to append a counter on to each multiple file (like 1,2,3...) name so they are uploaded and sent with unique names, even though the client sends them as same name.
Something like:
if (isset($_FILES) && (bool) $_FILES) {
$files = array();
$ext_error = "";
// Define allowed extensions
// counter= counter++;
// newFilename=oldFileName+String(counter);
// doRestStuffNewFileName();
// blahblahblah checking
// Store attached files in uploads folder
$server_file = dirname(__FILE__) . "/uploads/" . $path_part['basename'];`
`move_uploaded_file($temp_name, $server_file);`
array_push($files, $server_file);`
How can I modify it as such in php?
ok new comments:
I would like:
for int i=0;i<files[attached];i++;
fileName=files[i]
newFileName=filename+String(Integer(i));
uploadWithNewFileName();
writeToServerWithNewFileName();
This is php current code:
if (isset($_FILES) && (bool) $_FILES) {
$files = array();
$ext_error = "";
foreach ($_FILES as $name => $file) {
if (!$file['name'] == "") {
$file_name = $file['name'];
$size += $file['size'];
$temp_name = $file['tmp_name'];
$path_part = pathinfo($file_name);
$ext = $path_part['extension'];
// Store attached files in uploads folder
$server_file = dirname(__FILE__) . "/uploads/" . $path_part['basename'];
move_uploaded_file($temp_name, $server_file);
array_push($files, $server_file);
}
}
Why doesnt this work:
if (isset($_FILES) && (bool) $_FILES) {
$files = array();
$ext_error = "";
counter =0; //My code
foreach ($_FILES as $name => $file) {
counter++; //My code
if (!$file['name'] == "") {
$file_name = $file['name'];
$size += $file['size'];
$temp_name = $file['tmp_name'];
$path_part = pathinfo($file_name) + counter; //My code
$ext = $path_part['extension'];
// Store attached files in uploads folder
$server_file = dirname(__FILE__) . "/uploads/" . $path_part['basename'];
move_uploaded_file($temp_name, $server_file);
array_push($files, $server_file);
}
}