If your DataTables has many columns with long column names one solution is to render it inside a <div> tag with css style max-width is either fixed or 90%, 100% relative and overflow-x is scroll:

<div style="max-width: 1024px; overflow-x: scroll;">
    <?php DataTables::create(...); ?>
</div>

When the table is too wide, a horizontal scroll bar will appear allowing users to see the rest of the table without overflowing the page.