Time ago function PHP

time-ago.php

<?php
function time_ago($date, $granularity=1)
{
    $date = strtotime($date);
    if (!$date) return '';
    $difference = time() - $date;
    $periods = array(
    	'decad' => 315360000,
        'ann' => 31536000,
        'mes' => 2628000,
        'settiman' => 604800, 
        'giorn' => 86400,
        'or' => 3600,
        'minut' => 60,
        'second' => 1);
    if ($difference < 5) 
    { 
        return "proprio ora";
    } 
    else
    {                            
        foreach ($periods as $key => $value) 
        {
            if ($difference >= $value) {
                $time = floor($difference/$value);
                $difference %= $value;
                $retval .= ($retval ? ' ' : '').$time.' ';
                $retval .= $key;
                if ($time>1)
                {
                	if (in_array($key, array('or','settiman'))) $retval .= 'e';
                	else $retval .= 'i';
                }
                else
                {
                	if (in_array($key, array('second','minut','giorn'))) $retval .= 'o';
                	else if (in_array($key, array('or','settiman'))) $retval .= 'a';
                	else $retval .= 'e';
                }
                $granularity--;
            }
            if ($granularity == '0') { break; }
        }
        return $retval.' fa';      
    }
}