Purging old indexes from elasticsearch with logstash

Currently doing some work on logstash and found myself wanting to delete indexes over a certain age. The following PHP script gets the job done. I use php as my primary command line scripting language so use or port as interested.

#!/usr/bin/php
<?php

  date_default_timezone_set("America/Chicago");

  $index_name = "logstash-";
  $purge_age = 300;
  $elastic = "http://elastic.domain.com:9200";

  $data = file_get_contents("${elastic}/_cat/indices/${index_name}*");
  foreach(split("\n", $data) as $line)
  {
    $split = preg_split("/\s+/", $line);
    if(count($split) > 1)
    {
      $date = preg_replace("/${index_name}|\./", "", $split[2]);
      $split[] = floor((time() - strtotime($date)) / 60 / 60 / 24);
      $indexes[$date] = $split;
    }
  }

  if($purge_age > 0)
  {
    foreach($indexes as $nd => $index)
    {
      if($index[10] > $purge_age)
      {
        $url = sprintf("%s/%s", $elastic, $index[2]);
        printf("Purging %s with $url\n", $nd, $url);
        $c = curl_init();
        curl_setopt($c, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($c, CURLOPT_CUSTOMREQUEST, "DELETE");
        curl_setopt($c, CURLOPT_URL, $url);
        $result = curl_exec($c); // result should be {"acknowledged":true}
        curl_close($c);
      }
    }
  }

 asort($indexes);
 print_r($indexes);

?>