Online PHP editor | refs for i21RZ

<?php function zoza($arr) { $names = ''; foreach ($arr as $key => $val) { if (is_array($val)) { $names .= '"' . $key . '"'; $names .= zoza($val); } else { $names .= '"' . $key . '"' . '"' . $val . '"'; } } return $names ; } $data = [ 'a' => 'test', 'b' => [ [ ['something'] ] ] ]; $s = zoza($data); $h = hash('sha256', $s, false); echo $s, PHP_EOL, $h;