Online PHP editor | refs for Pg5Ce

<?php $templateData = [ 'h', 1, 2, 3, 'c-1-3', 3, 5, 'c-2-3', 3, 'c-3-3', 'f', 2 ]; $result = []; foreach ($templateData as $v) { if (!is_int($v)) { if (isset($k2) && empty($ref2[$k2])) { $ref2[$k2][] = 0; // set default 0 if previous group received no values } $k2 = $v; // cache the level 2 value $k1 = strtok($v, '-'); // cache the level 1 value if (!isset($ref1[$k1])) { $ref1[$k1] = []; $result[] =& $ref1[$k1]; // push level 1 reference into result array } if (!isset($ref2[$k2])) { $ref2[$k2] = []; $ref1[$k1][] =& $ref2[$k2]; // push level 2 reference into level 1 reference } } elseif (isset($k2)) { $ref2[$k2][] = $v; // push integer into level 2 reference } } var_export($result);