PHP table only generating style on first row of SQL query

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SQL

PHP

Hi there,

I'm trying to create my own PHP forum.

I have managed to retrieve and display 3 of 3 rows from my database but only the first record is being styled appropriately. Below is the PHP code I have so far:

<?php
$sql = "SELECT cat_id, cat_name, cat_description FROM categories";
 
$result = mysql_query($sql);
 
if(!$result)
{
    echo 'The categories could not be displayed, please try again later.';
}
else
{
    if(mysql_num_rows($result) == 0)
    {
        echo 'No categories defined yet.';
    }
    else
    {
		?>
        <table>
        	<tr>
            	<th>Category</th>
                <th>Last topic</th>
         	</tr>
        <?php     
        while($row = mysql_fetch_assoc($result))
        {               
			echo '<tr>';
                echo '<td class="leftpart">';
                    echo '<h3><a href="category.php?cat_id">' . $row['cat_name'] . '</a></h3>' . $row['cat_description'];
                echo '</td>';
                echo '<td class="rightpart">';
                            echo '<a href="topic.php?topic_id">Topic subject</a> at 10-10';
                echo '</td>';
            echo '</tr>';
		   echo '</table>';
        }
    }
}
?>
<?php 

Is there something i'm missing?