可以
<?php
echo "<table width=\"100%\" border=\"0\">";
echo " <tr>";
echo " <td> </td>";
echo " </tr>";
echo "</table>";
?>
<?php
echo "<table width=\"100%\" border=\"0\">";
echo " <tr>";
echo " <td> </td>";
echo " </tr>";
echo "</table>";
?>
$m_html=<<<HTML
<table border=1>
<tr><td>123</td></tr>
</table>
HTML;
echo $m_html;
?>