Morning,
I have a csv file and i want to do calculation. At first, i have already split the string into array.

I have retrieve two columns in my csv namely Head and SubHead.
I want to do the calculation of Head and SubHead in such format:
Row 1 of head multiply by Row 1 of SubHead
Continue until end of row.
if($out[1]=="*"||$out[1]=="/"||$out[1]=="+"||$out[1]=="-"){
  
  $out1=$out[1];
  if($out1=="*"){
    $first=$out[0];
    $second=$out[2];
        foreach ($mycsv[0] as $key => $value) {
     if (strcasecmp($value, $first) == 0) {
                for ($row=0; $row < $row_length; $row++) { 
                    if ($row == 0) {
                        echo "<tr>";
                        echo "<th colspan=100%>" . $mycsv[0][$key] . "</th>";
                        echo "</tr>";
                    } else {
                      $yes=$mycsv[$row][$key];
                        echo "<td>" . $yes . "</td>";
                    }                
                }
                
            }
                
            if (strcasecmp($value, $second) == 0) {
                for ($row=0; $row < $row_length; $row++) { 
                    if ($row == 0) {
                        echo "<tr>";
                        echo "<th colspan=100%>" . $mycsv[0][$key] . "</th>";
                        echo "</tr>";
                    } else {
                      $yes2=$mycsv[$row][$key];
                      echo "<td>" . $yes2 . "</td>";
                    }                
                }
                
            }
            
}
          }
Note: $out[1] is the Math operators.
Thanks for helping.