- array_map: documentation ( source)
- var_dump: documentation ( source)
- array_keys: documentation ( source)
<?php
$dataArray = [
[1, 1, 0],
[1, 0, 1],
[1, 1, 0],
[1, 0, 0],
[1, 0, 0]
];
$onePositions = array_map(function($row) {
return array_map(function($position) { return $position + 1; }, array_keys($row, 1));
}, $dataArray);
var_dump($onePositions);