PHP elapsed time function which takes in a timestamp and spits out a "timeago" sentence.

elapsed-time.php

<?php
function elapsed_time($timestamp, $precision = 2) {
  $time = time() - $timestamp;
  $a = array('decade' => 315576000, 'year' => 31557600, 'month' => 2629800, 'week' => 604800, 'day' => 86400, 'hour' => 3600, 'min' => 60, 'sec' => 1);
  $i = 0;
  foreach($a as $k => $v) {
    $$k = floor($time/$v);
    if ($$k) $i++;
    $time = $i >= $precision ? 0 : $time - $$k * $v;
    $s = $$k > 1 ? 's' : '';
    $$k = $$k ? $$k.' '.$k.$s.' ' : '';
    @$result .= $$k;
  }
  return $result ? $result.'ago' : '1 sec to go';
}
echo elapsed_time('1234567890').'<br />'; // 3 years 5 months ago
echo elapsed_time('1234567890', 6); // 3 years 5 months 1 week 2 days 57 mins 4 secs ago
?>