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<?php $rowCount = 6; echo <<<XD <table border=1> <tr> <th> K1 </th> <th> K2 </th> </tr> XD; foreach( range(1,$rowCount) as $row){ echo "\n<tr>\n"; if($row != $rowCount){ echo "\t<td>K1</td>\n\t<td>K2</td>\n"; } else { echo "\t<th colspan='2'> KK 1 KK 2 </th>\n"; } echo "</tr>\n\n"; } echo "\n</table>";
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
<table border=1> <tr> <th> K1 </th> <th> K2 </th> </tr> <tr> <td>K1</td> <td>K2</td> </tr> <tr> <td>K1</td> <td>K2</td> </tr> <tr> <td>K1</td> <td>K2</td> </tr> <tr> <td>K1</td> <td>K2</td> </tr> <tr> <td>K1</td> <td>K2</td> </tr> <tr> <th colspan='2'> KK 1 KK 2 </th> </tr> </table>

preferences:
227.06 ms | 404 KiB | 300 Q