Add array elements between each of the existing array elements - php

Question

I am trying to create a report in Excel by fetching data from MySql. I need to get subject headings from the database and output them to the excel sheet as columns e.g cell: D5, E5, F5 ... M5 etc.
So far I have managed to do so, therefore the display under the cells holds headings something like:
D5:Mathematics, E5:English, F5:Physics, etc.
| A | B | C | D | E | F | G | H |
--------------------------------------------------------------
1 | | | | | | | | |
...
5 | | | | Mathematics | English | Physics | ... | ... |
which is fine. The challenge is, I need to insert a GRADE heading in between each of the Subjects, something like this:
| A | B | C | D | E | F | G | H | I | J | K |
--------------------------------------------------------------------------------------
1 | | | | | | | | | | | |
...
5 | | | | Mathematics | GRADE | English | GRADE | Physics | GRADE | ... | ... |
Now here is what I have so far:
$stringindex = "DEFGHIJKLMNOPQRSTUVWXYZ"; // For the excel column cells
$arr_index = str_split($stringindex); // create array elements
$arr_val2 = array(); // create array
$subject = array();
$subname2 = array();
while($sub_row = mysqli_fetch_array($resub, MYSQLI_ASSOC)) {
$subject[] = $sub_row['name']; // Get the subjects from the database and put them in an array
}
foreach($subject as $sub => $subname) {
$subkey[] = $sub; // array of subject keys e.g 0|1|2|3
$subname2[] = $subname; // array of subjects
}
foreach($arr_index as $arr => $arr_val) {
$arr_val2[] = $arr_val; // array of letters e.g D|E|F|G
}
$acount = count($subname2);
$bcount = count($arr_val2);
$size = ($acount > $bcount) ? $bcount : $acount;
$a = array_slice($subname2, 0, $size);
$b = array_slice($arr_val2, 0, $size);
$combine = array_combine($a, $b);
$sheet = $objPHPExcel->setActiveSheetIndex(0); // PHPExcel functions
foreach($combine as $key => $val) { // GET SUBJECTS
$objPHPExcel->getActiveSheet()->getColumnDimension($val)->setAutoSize(true); // Sets Column Width
$sheet
->setCellValue($val.'5', $key); // Lists Subjects as columns
} // END of FOREACH LOOP
The above code is able to display the subjects as column headings in excel:
QUESTION:
How do I add a code to add a GRADE column after each subject heading?
I hope you'll point me in the right direction coz' I am now stuck.
Thanks in advance.

Answer 1

You can try something like this:
$stringindex = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; // For the excel column cells
$columns = str_split($stringindex); // create array elements
$rowIndex = 5; // start at row 5 in Excel
$columnIndex = 3; // start at column D in Excel
$subjects = array();
while($sub_row = mysqli_fetch_array($resub, MYSQLI_ASSOC)) {
$subject[] = $sub_row['name']; // Get the subjects from the database and put them in an array
}
$sheet = $objPHPExcel->setActiveSheetIndex(0); // PHPExcel functions
foreach($subject as $index => $subjectName) { // GET SUBJECTS
$columnName = getColumnName($columnIndex, $columns);
$objPHPExcel->getActiveSheet()->getColumnDimension($columnName)->setAutoSize(true); // Sets Column Width
$sheet->setCellValue($columnName.$rowIndex, $subjectName); // Lists Subjects as columns
$columnIndex++;
$columnName = getColumnName($columnIndex, $columns);
$objPHPExcel->getActiveSheet()->getColumnDimension($columnName)->setAutoSize(true); // Sets Column Width
$sheet->setCellValue($columnName.$rowIndex, "GRADE");
$columnIndex++;
} // END of FOREACH LOOP
function getColumnName($index, $columns) {
$columnName = "";
$numColumns = count($columns);
while($index >= $numColumns) {
$columnName = $columns[($index % $numColumns)] . $columnName;
$index = floor($index / $numColumns) - 1;
}
$columnName = $columns[($index % $numColumns)] . $columnName;
return $columnName;
}
I added a function getColumnName() which gives you "AA", "AB", ... in the event that your subject and grade columns go past the A-Z limit.

Answer 2

$temp=true;
then in the loop that goes through columns:
if($temp==true){
//do stuff
$temp=false;
}else{
//do other stuff
$temp=true;
}