Question

我想从两个表中获取数据。 hall_booking表中的UID是外键，注册中的uid是主键。

     <?php
    $bid=$_REQUEST['book_id'];
    $uid=$_REQUEST['id']; 
    echo $sel="select * from hall_booking INNER JOIN registration ON  
    hall_booking.uid=registration.uid WHERE  hall_booking.booking_id=$bid AND  
     registration.uid=$uid";
    $res=mysql_query($sel) or die(mysql_error());

    $row=mysql_num_rows($res);
    while($fet=mysql_fetch_array($res))
    {?>
    <center><form name="details" method="post" >
     <table border="0" cellspacing="8px" id="table">
     <tr><td>First Name : </td><td><?php echo $fet['first_name']; ?></td></tr>
     <tr><td>Last Name : </td><td><?php echo $fet['last_name'];?></td></tr>
     <tr><td>Address : </td><td><?php echo $fet['address'];?></td></tr>
     <tr><td>Contact no : </td><td><?php echo $fet['mobile_no'];?></td></tr>
     <tr><td>E-mail ID : </td><td><?php echo $fet['email_id'];?></td></tr>
     <tr><td>Status : </td><td><?php echo $fet['purpose']; ?></td>

      <tr><td colspan="2" style="font-size:12px"><center><a              
      href="show_plot_booking.php"> &lt;&lt;Back </a></center></td></tr>
      </table>
      </form></center>
<?php } ?>

Answer 1

检查您的$bid并且$uid不为空

尝试引用您的查询var

$sel="select * from hall_booking INNER JOIN registration ON  
    hall_booking.uid=registration.uid WHERE  hall_booking.booking_id='$bid' AND  
     registration.uid='$uid'";

也改为assoc

while($fet=mysql_fetch_assoc($res))

也最好使用count行数或查询返回行

$row=mysql_num_rows($res);

if($row > 0) {
  // do your stuff
}
else {
 echo 'echo no rows found';
}

查询未显示输出

1 个答案: