PHP格式化日期，显示“刚刚，几分钟前，几小时前，几天前，几个月前”

不废话，直接上代码，大家参考一下：

function format_date($time) {
    $nowtime = time();
    $difference = $nowtime - $time;
    switch ($difference) {
        case $difference <= '60' :
            $msg = '刚刚';
            break;
        case $difference > '60' && $difference <= '3600' :
            $msg = floor($difference / 60) . '分钟前';
            break;
        case $difference > '3600' && $difference <= '86400' :
            $msg = floor($difference / 3600) . '小时前';
            break;
        case $difference > '86400' && $difference <= '2592000' :
            $msg = floor($difference / 86400) . '天前';
            break;
        case $difference > '2592000' &&  $difference <= '7776000':
            $msg = floor($difference / 2592000) . '个月前';
            break;
        case $difference > '7776000':
            $msg = '很久以前';
            break;
    }
    return $msg;
}