how to create short code for data array sql - mysql

Question

i'm already can insert data into database using below query. But i want to shortening code for my a few column name because my it just like a continues number. i already explode mark by m1=A, m2=B, m3=C, m4=A and continue..
Below is my controller:
$mark = 'ABCADDBBAACBCDDABBCA';
$totalquestion = '10';
for($i=0; $i<$totalquestion; $i++):
$no = $i+1;
$m = substr($mark, 0, $no);
endfor;
$data[] = array(
'TotalQuestion' => $totalquestion,
'Mark' => $mark,
'm1' => $m[0],
'm2' => $m[1],
'm3' => $m[2],
'm4' => $m[3],
'm5' => $m[4],
'm6' => $m[5],
'm7' => $m[6],
'm8' => $m[7],
'm9' => $m[8],
'm10' => $m[9],
'm11' => $m[10],
'm12' => $m[11],
'm13' => $m[12],
'm14' => $m[13],
'm15' => $m[14],
'm16' => $m[15],
'm17' => $m[16],
'm18' => $m[17],
'm19' => $m[18],
'm20' => $m[19]
);
$this->excel_import_model->insert($data);
This is my result:
My question is how to re-code for my data[] array so i dont need to type manually m1, m2, m3 till m20. Sorry for my bad english

Answer 1

$mark = 'ABCADDBBAACBCDDABBCA';
$totalquestion = '20';
$data = array();
$data = array(
'TotalQuestion' => $totalquestion,
'Mark' => $mark,
);
//Split String into array
$list = str_split($mark);
$mlist = array();
//Loop through splited string
for($i=0; $i<$totalquestion; $i++):
$mlist['m'.$i] = $list[$i];
endfor;
//Merge here or you an even use push array in for loop itslef
$data = array_merge($data,$mlist);