Date Helper

date.php

<?php
class Date {
	public static function ago( $time ) {
		$time = time() - 25;
		$periods = array( 'second', 'minute', 'hour', 'day', 'week', 'month', 'year', 'decade' );
		$lengths = array('60','60','24','7','4.35','12','10');

		$now = time();

		$difference = $now - $time;
		$tense = 'ago';

		for( $j = 0; $difference >= $lengths[$j] && $j < count( $lengths ) - 1; $j++ ) {
			$difference /= $lengths[$j];
		}

		$difference = round( $difference );

		if( $difference != 1 ) {
			$periods[$j] .= 's';
		}
		$return = $difference . ' ' . $periods[$j] . ' ago';
		if( $return == '0 seconds ago' ){
			return 'Just Now';
		}
		return $return;
	}
}

array('%d second ago', '%d seconds ago'), 'minutes' => array('%d minute ago', '%d minutes ago'), // ... );