每两行之间的换行

Question

I'm quit new with mysql, and php but everytime i'm learning. For a friend of my I'm building a website with a small pricing-list on it. The prices are from a database, but I now want to create a empty line bewtween the 2nd and the 3th line, but I don't know how to do that.

I use the following code to receive the information from the database;

<table id="nails" class="prijzen">
    <thead>
        <tr>
            <th>Nails</th>
            <th>Price first visite</th>
            <th>Regular price</th>
        </tr> 
    </thead>
    <?php
        // while ($row = $queryNails->fetch_assoc()) {  
        $i = 0;
        while ($row = $regularNails->fetch_assoc())
        {
           if($i%3 == 0)
           {
              echo "<tr class='even'>";
              echo "<td>" . $row['name'] ."</td>";
              echo "<td>" . $row['prijs'] ."</td>";
              echo "<td>" . $row['actie_prijs'] ."</td>";
              echo "</tr>";
           }
           else
           {
              echo "<tr>";
              echo "<td>" . $row['name'] ."</td>";
              echo "<td>" . $row['prijs'] ."</td>";
              echo "<td>" . $row['actie_prijs'] ."</td>";
              echo "</tr>";
           }
        $i++;
    ?>
    <tbody>

        <?php 
            }
        ?> 
    </tbody>
</table>
<br>

I now have every odd-line a styling, but that is not something I like. I would like to create a sort of group of the output.

Hope someone can help me with that. If more information is needed, please let me know.

Answer 1

Please stop suggestion to enter a <br /> in between lines. That's not gonna work at all, tables-101: Everything not placed in a td will be placed in before the table. So all you get is a bunch of empty lines before the whole table.

The code is allready there (if you want it before every 3rd row:

if($i%3 == 0)
{
    // The code right here will only run when $i / 3  is exactly 0 (3,6,9,etc)
    echo '<tr><td colspan="3">Blank line</td></tr>';

    echo "<tr class='even'>";
    echo "<td>" . $row['name'] ."</td>";
    echo "<td>" . $row['prijs'] ."</td>";
    echo "<td>" . $row['actie_prijs'] ."</td>";
    echo "</tr>";
}

---

If you only want it once before the 3rd row, make this the first code in your while:

if($i==3){ echo '<tr><td colspan="3">Blank line</td></tr>'; }

---

The % is modulus. It gives you how much is left after getting the max amount of whole divisions:

echo 1 %3 = 1; 
echo 2 %3 = 2; 
echo 3 %3 = 0; // exactly dividable by 3
echo 4 %3 = 1; 
echo 5 %3 = 2; 
echo 6 %3 = 0;  // exactly dividable by 3