Adding an item to an associative array
You can simply do this
$data += array($category => $question);If your're running on php 5.4+
$data += [$category => $question];
I think you want $data[$category] = $question;
Or in case you want an array that maps categories to array of questions:
$data = array();foreach($file_data as $value) { list($category, $question) = explode('|', $value, 2); if(!isset($data[$category])) { $data[$category] = array(); } $data[$category][] = $question;}print_r($data);
before for loop :
$data = array();then in your loop:
$data[] = array($catagory => $question);