Online PHP editor | refs for XCHkn

<?php $input1 = ['hotels' => [ 'hotel' => [ [ "ort" => "rom", "lioc" => "inrom" ], [ "ort" => "paris", "lioc" => "inpsrisd" ], [ "ort" => "berlin", "lioc" => "inberlin" ], [ "ort" => "milano", "lioc" => "inmilano" ], [ "ort" => "paris", "lioc" => "anotherinpsrisd"], [ "ort" => "muc", "lioc" => "inmuc"] ] ]]; $input2 = ['hotels' => [ 'hotel' => [ [ "ort" => "rom", "lioc" => "inrom" ], [ "ort" => "beijing", "lioc" => "wanda" ] ] ]]; function recursiveUnique($input): array { // if the input is not an array, just return the input if (!is_array($input)) { return $input; } // check if the array is a list or an associative array else if (count($input) === 0 || array_keys($input) === range(0, count($input) - 1)) { return array_values(array_unique($input, SORT_REGULAR)); } else { foreach ($input as $key => $value) { $input[$key] = recursiveUnique($value); } return $input; } } var_dump(recursiveUnique(array_merge_recursive($input1, $input2)));