Time ago in PHP

time-ago.php

<?php

function time_ago($time) {

    $time = time() - $time;

    if($time < 5) {

        return 'Just now';

    }

    $units = array(

        365 * 24 * 60 * 60  => 'year',
        30 * 24 * 60 * 60   => 'month',
        24 * 60 * 60        => 'day',
        60 * 60             => 'hour',
        60                  => 'minute',
        1                   => 'second'

    );

    $units_plural = array(

        'year'              => 'years',
        'month'             => 'months',
        'day'               => 'days',
        'hour'              => 'hours',
        'minute'            => 'minutes',
        'second'            => 'seconds'

    );

    foreach($units as $seconds => $unit) {

        $decimal = $time / $seconds;

        if($decimal >= 1) {

            $rounded = round($decimal);
            $plural = $rounded > 1;

            return $rounded . ' ' . ($plural ? $units_plural[$unit] : $unit) . ' ago';

        }

    }

}