我想让这个成为可能
如果我是用户，我的左和右像"L"answers"R"
我想php应该自动chk可能的空位置注册。像
1=L，2=R，3=LL，4=RL，5=LR，6=RR-
user
/ '
(1) L R (2)
/' /'
(3) LL LR RL RR (6)
(5) (4)
如果发现"RL"位置为空（新用户应在"RL"下注册）
我的数据库有ID、用户名、Child_L、Child_R
我在下面写了这个代码
<?php
require_once 'config.php';
$username = "kishore";
$log=mysql_query("select * from users where username='".$username."'");
$row=mysql_fetch_array($log);
$child_left=$row['child_l'];
$child_left=$row['child_r'];
function chkchild($childuser){
$log=mysql_query("select * from users where username='".$childuser."'");
$row=mysql_fetch_array($log);
$child_left=$row['child_l'];
$child_left=$row['child_r'];
if ($child_left = NULL) {
echo"you can register under child_l";
}elseif ($child_right = NULL){
echo"you can register under child_r";
}
}
if ($child_left = NULL) {
echo"you can register under child_l";
}elseif ($child_right = NULL){
echo"you can register under child_r";
}else
chkchild($child_left);
?>
这是我的数据库表
https://i.stack.imgur.com/eYvTH.jpg
这可能会帮助您
function chkchild(){
while($t)
{
$qu=mysql_query("SELECT * FROM users WHERE child_L='' or child_R='';");
$rows=mysql_fetch_row($qu);
if($rows>0)
{
echo "No Positions are blank"
}
else
{
$rs=mysql_fetch_array($qu);
//Here you can check the complete list of all blank positions
}
}
}