Create table with PHP checking with before value and current value (Array)

Question

This is my data table1. I want this table change to as a table2. I have to use PHP for this. I wrote the some code using foreach but that is not working properly. C

Answer 1

Try this once i didn't check the output i am assuming array like follow

array(
     [
      "STUDENT_ID" => "1", 
     'MATHS' => 
             array( 
                 "EXAM_1" => 'test 1', 
                 "EXAM_2" => 'test2'), 
     'ART' => 
             array( 
                 "EXAM_1" => 'test 1', 
                  "EXAM_2"=> 'test2')
      ],
     [
      "STUDENT_ID" => "2", 
     'MATHS' => 
             array( 
                 "EXAM_1" => 'test 1', 
                 "EXAM_2" => 'test2'), 
     'ART' => 
             array( 
                 "EXAM_1" => 'test 1', 
                  "EXAM_2"=> 'test2')
      ]
     );

`

$output .= "<table border=1>
      <tr bgcolor=#ffffff><td>SeqNo</td>
      <td>Student Id</td>
      <td colspan="2">maths</td>
      <td colspan="2">art</td>
      ";

     $studentCounter = 0;

     foreach($result as $item)
        {
        $output .= "<tr><td>" . ++$studentCounter . " </td>  
                       <td>" . $item[STUDENT_ID] . "</td>
                       <td>" . $item[MATHS][EXAM_1] . "</td> 
                       <td>" . $item[MATHS][EXAM_2] . "</td>
                       <td>" . $item[ART][EXAM_1] . "</td>
                       <td>" . $item[ART][EXAM_2] . "</td></tr>";
                     "

        }
   $output .= "</table>";

Answer 2

you can generate result using sql by group_concat mysql function

SELECT * FROM table1 GROUP_CONCAT(student_id) ORDER BY subject_name DESC

this query will generate result something like this

student id=>1,subject=>math,exam1=>15,exam2=>20,subject=>art,exam1=>17,exam2=>19

Answer 3

If I understand correctly you want the table 2 to be as shown in the illustration so based on that I'm going to answer your question.

You can use the below HTML which will look like the table you wanted.

<table border=1>
  <tr bgcolor=#ffffff>
    <td>SeqNo</td>
    <td>Student Id</td>
    <td colspan = "2">maths</td>
    <td colspan = "2">art</td>
    </tr>
    <tr>
    <td colspan = "2"></td>
    <td>Exam 1</td>
    <td>Exam 2</td>
    <td>Exam 1</td>
    <td>Exam 2</td>
  </tr>
      <tr>
    <td></td>
    <td></td>
    <td>Exam 1</td>
    <td>Exam 2</td>
    <td>Exam 1</td>
    <td>Exam 2</td>
  </tr>
</table>

Want see jsFiddle here

You didn't post your SQL you don't need to use a forwach you can while loop it like shown below.

<table border=1>
  <tr bgcolor=#ffffff>
    <td>SeqNo</td>
    <td>Student Id</td>
    <td colspan = "2">maths</td>
    <td colspan = "2">art</td>
    </tr>
    <tr>
    <td colspan = "2"></td>
    <td>Exam 1</td>
    <td>Exam 2</td>
    <td>Exam 1</td>
    <td>Exam 2</td>
  </tr>
<?PHP while($row = $stmt -> fetch(PDO::FETCH_ASSOC){ ?>
  <tr>
    <td>$row["seqNo"]</td>
    <td>$row["studen_id"]</td>
    <td>$row["Exam1"]</td>
    <td>$row["Exam2"]</td>
    <td>$row["Exam1"]</td>
    <td>$row["Exam2"]</td>
  </tr>
<?php } ?>
</table>

Keep in mind this is with out your SQL so adjust it to fit your need and is in PDO.

Answer 4

Rowspan tells a cell how many rows to occupy, colspan how many columns.

$output .= "<table border=1>
    <tr bgcolor=#ffffff>
        <td rowspan="2">SeqNo</td>
        <td rowspan="2">Student Id</td>
        <td colspan="2">maths</td>
        <td colspan="2">art</td>
    </tr>
    <tr>
        <td>Exam 1</td>
        <td>Exam 2</td>
        <td>Exam 1</td>
        <td>Exam 2</td>
    </tr>";

$studentCounter = 0;

foreach($result as $item) {
    $output .= "<tr>
        <td>" . $studentCounter++ . " </td>  
        <td>" . $item["STUDENT_ID"] . "</td>
        <td>" . $item["MATHS"] . "</td> 
        <td>" . $item["ART"] . "</td>
        <td>" . $item["EXAM_1"] . "</td>
        <td>" . $item["EXAM_2"] . "</td></tr>";
}

$output .= "</table>";

Answer 5

It seems to me that the table structure you are using is incorrect.

Here is a correct table structure of the table layout you are looking for.

<table border=1>
    <thead>
        <tr>
            <th rowspan="2">Seq N0</th>
            <th rowspan="2">Student Id</th>
            <th colspan="2">maths</th>
            <th colspan="2">art</th>
        </tr>
        <tr>
            <td>Exam 1</td>
            <td>Exam 2</td>
            <td>Exam 1</td>
            <td>Exam 2</td>  
        </tr>
    </thead>
    <tbody>
        <tr>
            <td>1</td>
            <td>1</td>
            <td>82</td>
            <td>90</td>
            <td>60</td>
            <td>82</td>
        </tr>
        <tr>
            <td>1</td>
            <td>1</td>
            <td>82</td>
            <td>90</td>
            <td>60</td>
            <td>82</td>
        </tr>
    </tbody>
</table>

Answer 6

This would be your table design: (https://jsfiddle.net/vg3whzvq/2/)

<table border=1>
      <tr bgcolor=#ffffff>
        <td rowspan="2">SeqNo</td>
        <td rowspan="2">Student Id</td>
        <td colspan = "2">maths</td>
        <td colspan = "2">art</td>
        </tr>
        <tr>
        <td>Exam 1</td>
        <td>Exam 2</td>
        <td>Exam 1</td>
        <td>Exam 2</td>
      </tr>
          <tr>
        <td>1</td>
        <td>200301</td>
        <td>51</td>
        <td>25</td>
        <td>64</td>
        <td>45</td>
      </tr>
    </table>

Now to display the data with php you can do something like that:

$output .= "<table border=1>
          <tr bgcolor=#ffffff>
            <td rowspan="2">SeqNo</td>
            <td rowspan="2">Student Id</td>
            <td colspan = "2">maths</td>
            <td colspan = "2">art</td>
            </tr>
            <tr>
            <td>Exam 1</td>
            <td>Exam 2</td>
            <td>Exam 1</td>
            <td>Exam 2</td>
          </tr>";

          $studentCounter = 0;

foreach($result as $item)
            {
            $output .= "<tr>
                          <td>" . ++$studentCounter . " </td>  
                          <td>" . $item[STUDENT_ID] . "</td>
                          <td>" . $item[MATHS_EXAM_1] . "</td> 
                          <td>" . $item[MATH_EXAM_2] . "</td>
                          <td>" . $item[ART_EXAM_1] . "</td>
                          <td>" . $item[ART_EXAM_2] . "</td>
                        </tr>";
            }

 $output .= "</table>";

It now depends on how your $result looks like.