$shijianc1=strtotime($shuju['reachtime']);//进行比较的时间戳
$jt=strtotime(''.date("Y-m-d",time()).' 00:00:00');//今天零点时间戳
$zt=($jt-86400);//昨天零点时间戳
$qt=($zt-86400);//前天零点时间戳
if($shijianc1>$jt){
$myday="今天";
$mytime=date("H:i",strtotime($shuju['reachtime']));
}
elseif($shijianc1<$jt && $shijianc1>$zt){
$myday="昨天";
$mytime=date("H:i",strtotime($shuju['reachtime']));
}
elseif($shijianc1<$zt && $shijianc1>$qt){
$myday="前天";
$mytime=date("H:i",strtotime($shuju['reachtime']));
}
else{
$myday=date("m-d",strtotime($shuju['reachtime']));
$mytime=date("H:i",strtotime($shuju['reachtime']));
}