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 .= "
      ";

     $studentCounter = 0;

     foreach($result as $item)
        {
        $output .= "";
                     "

        }
   $output .= "

      
SeqNo
      
Student Id
      
maths
      
art
" . ++$studentCounter . " 
  
                       
" . $item[STUDENT_ID] . "
                       
" . $item[MATHS][EXAM_1] . "
 
                       
" . $item[MATHS][EXAM_2] . "
                       
" . $item[ART][EXAM_1] . "
                       
" . $item[ART][EXAM_2] . "
";