Delete file older than 7 days using php

delete_file.php

<?php
// save in directory where file exists
$dir = __DIR__;
$files = scandir($dir);
$date = date_create();
$limit =  strtotime('-7 day', date_timestamp_get($date));
$total = 0;

$count = 0;
foreach ($files as $key => $file) {
    $total++;
    $created = filemtime($file);
    if ($file == 'index.php' || $file == '.' || $file == '..') {
        continue;
    }
        // echo date('Y-m-d', $created)." < ".date('Y-m-d', $limit)."\n";
    if ($created < $limit) {
        unlink($file);
        $count++;
    }
}
// echo $count . " Files Deleted of " . $total;