php实现Facebook风格的 time ago函数

php实现Facebook风格的 time ago函数

非常好用，只要把里面的英文替换成中文就行了

英文函数代码如下：

<?php
function nicetime($date)
{
    if(empty($date)) {
        return "No date provided";
    }

    $periods         = array("second", "minute", "hour", "day", "week", "month", "year", "decade");
    $lengths         = array("60","60","24","7","4.35","12","10");

    $now             = time();
    $unix_date         = strtotime($date);

       // check validity of date
    if(empty($unix_date)) {
        return "Bad date";
    }

    // is it future date or past date
    if($now > $unix_date) {
        $difference     = $now - $unix_date;
        $tense         = "ago";

    } else {
        $difference     = $unix_date - $now;
        $tense         = "from now";
    }

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

    $difference = round($difference);

    if($difference != 1) {
        $periods[$j].= "s";
    }

    return "$difference $periods[$j] {$tense}";
}

$date = "2009-03-04 17:45";
$result = nicetime($date); // 2 days ago

?>

中文函数代码如下：

function nicetime($date)
    {
        if(empty($date)) {
            return "No date provided";
        }

        $periods         = array("秒", "分钟", "小时", "天", "周", "月", "年", "十年");
        $lengths         = array("60","60","24","7","4.35","12","10");

        $now             = time();
        $unix_date         = strtotime($date);

           // check validity of date
        if(empty($unix_date)) {
            return "Bad date";
        }

        // is it future date or past date
        if($now > $unix_date) {
            $difference     = $now - $unix_date;
            $tense         = "以前";

        } else {
            $difference     = $unix_date - $now;
            $tense         = "from now";
        }

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

        $difference = round($difference);

        if($difference != 1) {
            $periods[$j].= "";
        }

        return "$difference$periods[$j]{$tense}";
    }
    //用法示例
    // $date = "2009-03-04 17:45";
    // $result = nicetime($date); // 2 days ago