Script that recursively reads a directory, then copies the files to another (flat) directory and renames them to a unique filename

fix_photo_filenames

<?php
/**
 * Script that recursively reads a directory, then copies the files to another
 * directory. Filenames will be 20120525-1.jpg, 20120525-2.jpg, etc.
 * 
 */

ini_set('date.timezone', 'America/Los_Angeles');

$dir      = '/Users/luis/Pictures/Nikon Transfer 2/';
$dest_dir = '/Users/luis/Pictures/raw2/';

$it = new RecursiveDirectoryIterator($dir);
$files = array();
$dates = array();
$extensions = array();

// Create separate arrays, for sorting
foreach (new RecursiveIteratorIterator($it) as $file) {
    // No hidden files
    if (strpos($file->getBasename(), '.') === 0) {
        continue;
    }
    $files[] = $file->getRealPath();
    $dates[] = date('Ymd', $file->getCTime());
    $extensions[] = $file->getExtension();
}

array_multisort($dates, $files, $extensions);

$i = $c = 0;
$last_date = null;
foreach ($files as $file) {
    $temp_date = $dates[$i];
    if ($last_date == $temp_date) {
        $c++;
    } else {
        $c = 1;
    }
    $last_date = $temp_date;
    $filename = "{$dates[$i]}-$c.{$extensions[$i]}";
    echo $file . ' ' . $dates[$i] . ' ' . $filename . "\n";
    copy($file, $dest_dir . $filename);  
    $i++;
}
echo "$i files copied\n";
exit(0);