Make a pretty date difference from the current time

prettyDateDifference.php

<?php
/*
  Make a pretty date difference from the current time
  Author: Luca Zorzi (@LucaTNT)
  License: BSD
*/

function parseDate($timestamp)
{
  // Current timestamp
	$now = time();

	// Difference from given timestamp
	$difference = $now - $timestamp;

	// If less than one hour (59 minutes and 30 seconds, to be precise), we count minutes
	if($difference < 3570)
	{
		$output = round($difference / 60).'m';
	}
	// If less than 23 hours 59 minutes and 30 seconds, we count hours
	elseif ($difference < 86370)
	{
		$output = round($difference / 3600).'h';
	}
	// If less than 6 days 23 hours 59 minutes and 30 seconds, we count days
	elseif ($difference < 604770)
	{
		$output = round($difference / 86400).'d';
	}
	// If less than 164 days 23 hours 59 minutes and 30 seconds, we count weeks
	elseif ($difference < 31535970)
	{
		$output = round($difference / 604770).'w';
	}
	// Else we count years
	else
	{
		$output = round($difference / 31536000).'y';
	}

	return $output;
}
?>