PHP How do I calculate relative time?

Possible Duplicate:
PHP: producing relative date/time from timestamps

Given a specific DateTime value, how do I display relative time, like

35 minutes ago

2 hours ago

3 days ago

1 month ago

etc, etc...?

mysql_query("UPDATE users SET lastlogin = ".time()." WHERE id = ".$userID); 

---

this may help you

function time_ago_en($time)
    {
        if(!is_numeric($time))
            $time = strtotime($time);

        $periods = array("second", "minute", "hour", "day", "week", "month", "year", "age");
        $lengths = array("60","60","24","7","4.35","12","100");

        $now = time();

        $difference = $now - $time;
        if ($difference <= 10 && $difference >= 0)
            return $tense = 'just now';
        elseif($difference > 0)
            $tense = 'ago';
        elseif($difference < 0)
            $tense = 'later';

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

        $difference = round($difference);

        $period =  $periods[$j] . ($difference >1 ? 's' :'');
        return "{$difference} {$period} {$tense} ";
    }

Example

<?php

echp   time_ago_en(time() - 300);
// 5 minutes ago
?>

---

strtotime is a nice function

let me be more specific

strtotime(-5 days);

or

strtotime(-1 month);

There is an optional 2nd argument which is another time stamp of the time you want to start at, giving your relative time. Why the downvote?

---

<?php
function relativeTime($time = false, $limit = 86400, $format = 'g:i A M jS') {
    if (empty($time) || (!is_string($time) &amp;&amp; !is_numeric($time))) $time = time();
    elseif (is_string($time)) $time = strtotime($time);

    $now = time();
    $relative = '';

    if ($time === $now) $relative = 'now';
    elseif ($time > $now) $relative = 'in the future';
    else {
        $diff = $now - $time;

        if ($diff >= $limit) $relative = date($format, $time);
        elseif ($diff < 60) {
            $relative = 'less than one minute ago';
        } elseif (($minutes = ceil($diff/60)) < 60) {
            $relative = $minutes.' minute'.(((int)$minutes === 1) ? '' : 's').' ago';
        } else {
            $hours = ceil($diff/3600);
            $relative = 'about '.$hours.' hour'.(((int)$hours === 1) ? '' : 's').' ago';
        }
    }

    return $relative;
}
?>

资源

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