PHP顯示多少時間之前

php_display_n_minutes_ago.php

<?php
// reference: http://stackoverflow.com/questions/18685/how-to-display-12-minutes-ago-etc-in-a-php-webpage
function timeAgo($timestamp){
    $datetime1=new DateTime("now");
    $datetime2=date_create($timestamp);
    $diff=date_diff($datetime1, $datetime2);
    $timemsg='';
    if($diff->y > 0){
        $timemsg = $diff->y .' year'. ($diff->y > 1?"'s":'');

    }
    else if($diff->m > 0){
     $timemsg = $diff->m . ' month'. ($diff->m > 1?"'s":'');
    }
    else if($diff->d > 0){
     $timemsg = $diff->d .' day'. ($diff->d > 1?"'s":'');
    }
    else if($diff->h > 0){
     $timemsg = $diff->h .' hour'.($diff->h > 1 ? "'s":'');
    }
    else if($diff->i > 0){
     $timemsg = $diff->i .' minute'. ($diff->i > 1?"'s":'');
    }
    else if($diff->s > 0){
     $timemsg = $diff->s .' second'. ($diff->s > 1?"'s":'');
    }

$timemsg = $timemsg.' ago';
return $timemsg;
}

?>

<?php
// another solution
function time_since($since) {
    $chunks = array(
        array(60 * 60 * 24 * 365 , 'year'),
        array(60 * 60 * 24 * 30 , 'month'),
        array(60 * 60 * 24 * 7, 'week'),
        array(60 * 60 * 24 , 'day'),
        array(60 * 60 , 'hour'),
        array(60 , 'minute'),
        array(1 , 'second')
    );

    for ($i = 0, $j = count($chunks); $i < $j; $i++) {
        $seconds = $chunks[$i][0];
        $name = $chunks[$i][1];
        if (($count = floor($since / $seconds)) != 0) {
            break;
        }
    }

    $print = ($count == 1) ? '1 '.$name : "$count {$name}s";
    return $print;
}
?>