php按会话显示upliner详细信息

我有一个显示用户下行详细信息的代码，我想要一个显示该用户上行详细信息的代码。 困惑

什么是上行线和下行线？ 好的，比如我是jazz，我把John介绍到这个网站，John注册了我的链接，比如stackoverflow.com/signup？ref=jazz。所以现在约翰是我的下行者，我是他的上行者

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我整理出来的只是在affiliateuser“upline”中创建一个新行并从中选择

<?php
$sqlquery="SELECT username,country,doj,pcktaken FROM affiliateuser where upline='".$_SESSION['username']."' ORDER BY Id DESC LIMIT 1"; //fetching website from databse
$rec2=mysqli_query($con,$sqlquery);
$row2 = mysqli_fetch_row($rec2);
$referusername=$row2[0];
$refcountry=$row2[1];
$refdate=$row2[2];
$refpckid=$row2[3];
$sqlquery11="SELECT name FROM packages where id = $refpckid"; //fetching no of days validity from package table from databse
$rec211=mysqli_query($con,$sqlquery11);
@$row211 = mysqli_fetch_row($rec211);
$refpckname=$row211[0]; //assigning we

                          ?>


<?php
$sqlquery="SELECT username,country,doj,pcktaken FROM affiliateuser where upline='".$_SESSION['username']."' ORDER BY Id DESC LIMIT 1"; //fetching website from databse
$rec2=mysqli_query($con,$sqlquery);
$row2 = mysqli_fetch_row($rec2);
$referusername=$row2[0];
$refcountry=$row2[1];
$refdate=$row2[2];
$refpckid=$row2[3];
$sqlquery11="SELECT name FROM packages where id = $refpckid"; //fetching no of days validity from package table from databse
$rec211=mysqli_query($con,$sqlquery11);
@$row211 = mysqli_fetch_row($rec211);
$refpckname=$row211[0]; //assigning we

                          ?>