Online PHP editor | output for OjjLF

<?php $array1 = array('firstname'=> "John", 'lastName'=>"Doe", 'email'=>"jdoe@example.com", 'username'=>"johndoe"); $array2 = array('firstname'=>"", 'email'=>""); foreach ($array2 as $key => &$value) { $value = $array1[$key]; } echo http_build_query($array2) . PHP_EOL; echo urldecode(http_build_query($array2)) . PHP_EOL; echo implode('&', array_map(function ($k, $v) { return "$k=$v"; }, array_keys($array2), $array2)); echo PHP_EOL; echo implode('&', array_map(function ($k, $v) { return "\"$k\"=\"$v\""; }, array_keys($array2), $array2));