- urldecode: documentation ( source)
- urlencode: documentation ( source)
- http_build_query: documentation ( source)
<?php
$data = ['a' => 'n%20n'];
foreach($data as $k => $v) {
print urlencode(urldecode($k)) . '=' . urlencode(urldecode($v))."\n";
}
print http_build_query($data)."\n";