Online PHP editor | output for XWPmA

<?php $array = array(array("o_name" => "color,size", "option" => "red-s")); $array[] = array("o_name" => "color,size", "option" => "red-m"); $array[] = array("o_name" => "color,size", "option" => "blue-s"); $array[] = array("o_name" => "color,size", "option" => "blue-m"); $res = []; foreach($array as $row) { $data = array_combine(explode(',', $row['o_name']), explode('-', $row['option'])); foreach($data as $name => $v) { $res[$name][$v] = true; } } $res = array_map(function ($e) {return implode(",", array_keys($e));}, $res); print_r($res);