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;
}