function timeago( $ptime ) {
	$etime = time() - $ptime;
	if ($etime < 59) return '刚刚';
	$interval = array (
		12 * 30 * 24 * 60 * 60 => '年前 ('.date('Y-m-d', $ptime).')',
		30 * 24 * 60 * 60 => '个月前 ('.date('Y-m-d', $ptime).')',
		7 * 24 * 60 * 60 => '周前 ('.date('m-d', $ptime).')',
		24 * 60 * 60 => '天前',
		60 * 60 => '小时前',
		60 => '分钟前',
		1 => '秒前'
	);
	foreach ($interval as $secs => $str) {
		$d = $etime / $secs;
		if ($d >= 1) {
			$r = round($d);
			return $r . $str;
		}
	}
}