What is the potential issue with having the table header repeated multiple times within a table in PHP?

Having the table header repeated multiple times within a table in PHP can lead to confusion for users and can make the table harder to read. To solve this issue, you can use the "thead" tag to define the header of the table only once at the beginning of the table.

<table>
    <thead>
        <tr>
            <th>Header 1</th>
            <th>Header 2</th>
            <th>Header 3</th>
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>Data 1</td>
            <td>Data 2</td>
            <td>Data 3</td>
        </tr>
        <tr>
            <td>Data 4</td>
            <td>Data 5</td>
            <td>Data 6</td>
        </tr>
    </tbody>
</table>