How to insert data by using td id - php

Question

In my PHP code is below.
<table width="100%" >
<tr width="100%" class="bgcolor_02">
<th ROWSPAN="2" >SUBJECTS </th>
<th COLSPAN="2" >EXAMS </th>
<th COLSPAN="2" >PROJECTS </th>
</tr>
<tr class="bgcolor_02">
<th id="1E"> 1.EXAM</th>
<th id="2E"> 2.EXAM</th>
<th id="1P"> 1.PROJECT</th>
<th id="2P"> 2.PROJECT</th>
</tr>
<?php
$myexamresults = $db-> getrows (" SELECT * FROM `es_exam_result` WHERE `es_studentid` = '".$_SESSION['eschools']['user_id']."' ORDER BY `es_examorder` ASC ");
$pre_subjects=subjectnameByClass($es_subjectshortname);
foreach ($pre_subjects as $ndsdersliste ) {
$subjeid=$ndsdersliste['es_subjectid']; ?>
<tr > <td ><?php echo $ndsdersliste['es_subjectname']; ?></td>
<?php
foreach ($myexamresults as $ndsmyexam) {
$puan="";
if( $ndsdersliste['es_subjectname'] == $ndsmyexam['es_subjectname'] ) {
$examname = $ndsmyexam['es_examname'];
$puan = $ndsmyexam['es_puan'];
if ($examname =="1.Exam"){ ?> <td headers="1E" ><?php {echo $puan ;} ?> </td> <?php }
if ($examname =="2.Exam"){ ?> <td headers="2E" ><?php {echo $puan ;} ?> </td> <?php }
if ($examname =="1.Project"){ ?> <td headers="1P" ><?php {echo $puan ;} ?> </td> <?php }
if ($examname =="2.Project"){ ?> <td headers="2P" ><?php {echo $puan ;} ?> </td> <?php }
} } ?>
</tr>
<?php } ?>
</table>
I can get exam results from database. But I can not insert correct data under headers. If a student have just "1.Project" result, It is showing under "1.Exam". How to insert under correct title. Thanks..

Answer 1

You have to create empty <td> if there is no result to have the same number of <td> for each <tr>:
<tr > <td ><?php echo $ndsdersliste['es_subjectname']; ?></td>
<?php
$td = [];
foreach ($myexamresults as $ndsmyexam) {
$puan="";
if( $ndsdersliste['es_subjectname'] == $ndsmyexam['es_subjectname'] )
{
$examname = $ndsmyexam['es_examname'];
$puan = $ndsmyexam['es_puan'];
if ($examname =="1.Exam") { $td['1E'] = $puan ; }
if ($examname =="2.Exam") { $td['2E'] = $puan ; }
if ($examname =="1.Project") { $td['1P'] = $puan ; }
if ($examname =="2.Project") { $td['2P'] = $puan ; }
}
}
if (isset($td['1E'])) echo '<td headers="1E">'.$td['1E'] .'</td>' ; else echo '<td headers="1E"></td>' ;
if (isset($td['2E'])) echo '<td headers="2E">'.$td['2E'] .'</td>' ; else echo '<td headers="2E"></td>' ;
if (isset($td['1P'])) echo '<td headers="1P">'.$td['1P'] .'</td>' ; else echo '<td headers="1P"></td>' ;
if (isset($td['2P'])) echo '<td headers="2P">'.$td['2P'] .'</td>' ; else echo '<td headers="2P"></td>' ;
?>
</tr>