在for循环中打印表中的2列

Question

I am trying to print results from a mysql query in a table that will be in 2 columns. to do this through my for loop i did the following:

    $num = 1;
            while($r = $qry->fetch())
            {
                    if (!fmod($num,2)) echo '<tr>';
                    echo "<td>" . $num . "</td>";
                    if (!fmod($num,2)) echo '</tr>';
                    $num++;
           }

however, each row is getting its own row in the table. even though $num is printed and shows 1,2,3,4 and so on. what am i missing?

Answer 1

You got it almost right, but each iteration needs to EITHER display a <tr> OR an </tr> so:

https://eval.in/93455

$num = 1;
        while($num < 11)
        {
                if (fmod($num,2)) echo '<tr>';
                echo "<td>" . $num . "</td>";
                if (!fmod($num,2)) echo '</tr>';
                $num++;
       }

Note I altered your while condition for test purposes