计算当天起始点和结束点时间戳 去当天的数据

/*

*+ -------------------------------

* 计算当天起始点和结束点时间戳 去当天的数据

*+ ------------------------------

*/

$daybegin=strtotime(date("Ymd"));
$dayend=$begin+86400;
$query = "SELECT * FROM `info` WHERE addtime<$dayend AND addtime>$daybegin";