time_date_helpers.php

<?php

// date
$date = '423523463463'; // time stamp
$date = date("F j, Y, g:i a", $date);

// satring to date
$str = strtotime('10/16/2016');
$date = date('M d Y',$str);
echo $date; 

// Count date diference
$now = time(); // or your date as well
$datediff = ($now) - ($item->created);
$days = floor($datediff / (60 * 60 * 24));
echo $days;

/**
 * Time Ago Function
*/
function time_ago($datetime, $full = false) {
    $now = new DateTime;
    $ago = new DateTime($datetime);
    $diff = $now->diff($ago);
    $diff->w = floor($diff->d / 7);
    $diff->d -= $diff->w * 7;
    $string = array(
        'y' => 'year',
        'm' => 'month',
        'w' => 'week',
        'd' => 'day',
        'h' => 'hour',
        'i' => 'minute',
        's' => 'second',
    );
    foreach ($string as $k => &$v) {
        if ($diff->$k) {
            $v = $diff->$k . ' ' . $v . ($diff->$k > 1 ? 's' : '');
        } else {
            unset($string[$k]);
        }
    }
    if (!$full) $string = array_slice($string, 0, 1);
    return $string ? implode(', ', $string) . ' ago' : 'just now';
}

echo time_ago($some_date);

/**
 * CONVERT SECONDS TO DAYS, HOURS AND MINUTES
 * 
 */
function secsToStr($secs) {
    if($secs>=86400){$days=floor($secs/86400);$secs=$secs%86400;$r=$days.' day';if($days<>1){$r.='s';}if($secs>0){$r.=', ';}}
    if($secs>=3600){$hours=floor($secs/3600);$secs=$secs%3600;$r.=$hours.' hour';if($hours<>1){$r.='s';}if($secs>0){$r.=', ';}}
    if($secs>=60){$minutes=floor($secs/60);$secs=$secs%60;$r.=$minutes.' minute';if($minutes<>1){$r.='s';}if($secs>0){$r.=', ';}}
    $r.=$secs.' second';if($secs<>1){$r.='s';}
    return $r;
}
/* usage */
$seconds = "56789";
$output = secsToStr($seconds);
echo $output;