Day specific back up removal script

Most of us will have the difficulty in removing the everyday backup files of server since it will be pilled up for a long time. The following code is to remove the files and keep only certain days files.

Conditions,

Keeps latest one week files

Keeps last Monday’s file of all the month for last one year

Keeps current month’s all Monday files

<?php
$dir_paths = "/root/testfolder/*.tar";

$files = array();
foreach (glob($dir_paths) as $file) {
    $matches = array();
    preg_match('/(\d{4}-\d{2}-\d{2})/', $file, $matches);
    $files[] = $file;
}
removeFiles($files);
/*** Remove files older than 395days ,and keeps only each months last monday ,current month all mondays and last 7days files ***/
function removeFiles($files){
    $last_7days = array();
    for ($i=0; $i<7; $i++)
    {
        $days = date("Y-m-d",strtotime($i." days ago"));
        $last_7days[$days] = $days;
    }

    foreach($files as $k=>$v){
        $matches = array();
        preg_match('/(\d{4}-\d{2}-\d{2})/', $v, $matches);
        if(array_key_exists($matches[0],$last_7days)){
            unset($files[$k]);
        }else{
            $cur_month = date('m');
            $file_month = date('m',strtotime($matches[0]));

            $date_stamp = strtotime($matches[0]);
            $stamp = date('l', $date_stamp);

            if((strtotime($matches[0]) < strtotime(date('Y-m-d', strtotime("-395 days"))))){
                continue;//unset($files[$k]);
            }else if(($stamp == 'Monday') && ($cur_month==$file_month)){
                unset($files[$k]);
            }else if( (date('Y-m-d', strtotime(' last Monday of '.date('F',$date_stamp)." ".date('Y',$date_stamp)))) == $matches[0]){
                unset($files[$k]);
            }
        }
    }

    foreach($files as $f){
        unlink($f);
    }
}

?>