<?php
$text2='<td bgcolor="red"width="100px"height="100px"></td>';
$text3='<td bgcolor="white"width="100px"height="100px"></td>';
$text4='<td bgcolor="#87ceeb"width="100px"height="100px"></td>';

$text1=<<<tabel
<table  border="0" width="300px" height="300px"bgcolor="white">
<tr>
{$text2}
{$text4}
{$text2}
</tr>
<tr>
{$text4}
{$text3}
{$text2}
</tr>
<tr>
{$text2}
{$text2}
{$text4}
</tr>


</table>
tabel;

echo $text1;