I've recently been working on a new project that called for a fancy looking time and date system.
To solve this issue I've wrote one.

When used it outputs stuff such as:
30 seconds
2 mins
1 hour 13 mins
May 22, 2013

Plonk it in a PHP file and use it as dateify("timestamp");
It works out how long ago it is since that date.
You may want to add 'ago' after such as:
<?php echo dateify($post['stamp'])." ago."; ?>

Have fun, feel free to point out any issues you have with it.

function dateify($stamp = null) {
    $current = time();
    $differ = $current-$stamp;
    if ($differ < 86400 && $differ > 30) {
        // Below 24hrs.
        $mins = round($differ/60);
        if ($mins > 60) { $hours = round($mins/60); }
        if ($hours > 1) { $word_h = "hours"; } else { $word_h = "hour"; }
        if ($mins > 1) { $word_m = "mins"; } else { $word_h = "min"; }
        if ($hours > 0) { $mins = $mins - ($hours * 60); }
        if ($hours <= 0) {
            $scentence = "{$mins} {$word_m}";
        }
        else {
            $scentence = "{$hours} {$word_h} {$mins} {$word_m}";
        }
        return $scentence;
    }
    else if ($differ <= 30) {
        // 30 Seconds ago.
        return $differ." seconds";
    }
    else {
        return substr(date('F',$stamp),0,3).chr(32).date('j, Y',$stamp);
    }
}