PHP - Issues With If Statement And Mysql Data

Hello to all,

I have problem figuring out how to properly display data fetched from MySQL database in a HTML table.

In the below example I am using two while loops, where the second one is nested inside first one, that check two different expressions fetching data from tables found in a MySQL database. The second expression compares the two tables IDs and after their match it displays the email of the account holder in each column in the HTML table.

The main problem is that the 'email' row is displayed properly while its while expression is not nested and alone(meaning the other data is omitted or commented out), but either nested or neighbored to the first while loop, it is displayed horizontally and the other data ('validity', 'valid_from', 'valid_to') is not displayed.'

Can someone help me on this, I guess the problem lies in the while loop?
Here is part of the HTML code:

<thead>
 <tr>
 <th data-column-id="id" data-type="numeric">ID</th>
 <th data-column-id="email">Subscriber's Email</th>
 <th data-column-id="validity">Validity</th>
<th data-column-id="valid_from">Valid From</th>
 <th data-column-id="valid_to">Valid To</th>
</tr>
</thead>

Here is part of the PHP code:

    <?php
    while($row = $stmt->fetch(PDO::FETCH_ASSOC))
    {
        echo '
            <tr>
                <td>'.$row["id"].'</td>
        ';
        while ($row1 = $stmt1->fetch(PDO::FETCH_ASSOC)) {
        echo '
                <td>'.$row1["email"].'</td>
        ';
        }
        if($row["validity"] == 1) {
            echo '<td>'.$row["validity"].' month</td>';
        }else{
            echo '<td>'.$row["validity"].' months</td>';
        }
        echo '  <td>'.$row["valid_from"].'</td>
                <td>'.$row["valid_to"].'</td>
        </tr>';
    }
    ?>

P.S. Please know that I have purposely omitted the connection part and the methods in the class that are used in this code to keep the spot of the problem as clean as possible. If you need me to rephrase the question, please ask.

Thank you.

In the same $-POST , i wanted  to perform update and delete. With the updated and deleted database, I need to select the updated data from the database. However, it tells me:  Warning: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given in... .I am new to sql in php, is it true that i cannot perform sql in this way? Or is there any suggestion to perform select straight after deleting and updating?

CANCEL BOOK RESERVATION
if(isset($_POST['cancelres']))
{


        $query = "DELETE FROM reserved_books WHERE id='$resid';"; //delete reservation
        $query .="UPDATE reserved_books SET queue = queue - 1 WHERE bookid = '$bookid' AND queue > '$bookqueue';";//update queue number where reservation that queue behind/after/ the current reservation
        $query_run = mysqli_multi_query($connection, $query);

        if($query_run)
        {
          $_SESSION['success'] = "Reservation Cancelled";
        }
        else
        {
          $_SESSION['status'] = " Reservation Not Cancelled";    
        }

        $query= "SELECT title FROM books WHERE id = '$bookid';"; //get book title from db
        $query_run = mysqli_query($connection,$query);
        if(mysqli_num_rows($query_run)>0)
        {
            foreach ($query_run as $row) {
            $title = $row['title'];
            }
        }
        $bookres = "SELECT * FROM reserved_books WHERE bookid = '$bookid' AND queue = 1";
        $bookres_run = mysqli_query($connection,$bookres);
        foreach($bookres_run as $row)
        {
            $res_username = $row['username'];
            $res_id = $row['id'];
        }

        $query= "SELECT option_value FROM settings WHERE option_name = 'email_temp_rescollect'"; //get email template from db
        $query_run = mysqli_query($connection,$query);
        if(mysqli_num_rows($query_run)>0)
        {
            $row = mysqli_fetch_array($query_run);
            $rescollect_template = $row[0];
        }}

<?php 
mysql_connect(localhost, $db_username, $db_password);
 @mysql_select_db($db_database) or die("No connection");  

$query = "Select * FROM table WHERE column='stuff' AND parent='1,2' ORDER BY id DESC LIMIT 10";
 $query_result = mysql_query($query);
 $num_rows = mysql_num_rows($query_result);  
 mysql_close();  

?>  

<?php
    for($i=0; $i< $num_rows; $i++){   //start a loop 
    $stuff = mysql_result($query_result, $i, "column");

    $row = mysql_fetch_assoc($query_result, $i);
    if($row['parent'] == 1) {
        $url = 'http://google.com';
    } else {
        $url = 'http://www.bing.com';
    }

?>