Renaming already existing files - php

Question

Currently I am working on a media uploader system.
When a user uploads files, I wanted the system to automatically check whether this file already exists, and if so, add a (x) to the basename.
DSC_2193.jpg would become DSC_2193 (1).jpg
DSC_2193 (2).jpg would become DSC_2193 (3).jpg
So I came up with the following function:
<?php
private function setFileName($path)
{
if (file_exists($path)) {
$file = pathinfo($path);
if (preg_match('/\(([0-9]+)\).' . $file['extension'] . '/', $file['basename'], $matches)) {
return $this->setFileName($file['dirname'] . '/' . preg_replace_callback('/\(([0-9]+)\).' . $file['extension'] . '/', function($matches)
{
return '(' . ($matches[1] + 1) . ')';
}, $file['basename']) . '.' . $file['extension']);
} else {
$basename = substr(basename($path, $file['extension']), 0, -1);
$basename .= ' (1).' . $file['extension'];
return $this->setFileName($file['dirname'] . '/' . $basename);
}
}
else
return $path;
}
?>
Now I was wondering: would this be the right approach to achieve this? If not: maybe someone can come up with a better alternative. If it is the most efficient way, maybe someone benefits from this.

Answer 1

You can do it easily using while cycle. Here is simple scratch:
private function setFileName($path)
{
$file = pathinfo($path);
if (file_exists($path)) {
$i = 1;
while (file_exists($file['filename'] . ' (' . $i . ').' . $file['extension'])) $i++;
$filename = $file['filename'] . ' (' . $i . ').' . $file['extension']; // don't know if you want also directory path
}
else
$filename = $file['filename'] . '.' . $file['extension'];
// some code to rename/move_uploaded_file...
}
I don't know what you want then if you have $filename set (move_uploaded_file, or just return $filename), so the rest of code is up to you.