- str_replace: documentation ( source)
- http_build_query: documentation ( source)
- strtolower: documentation ( source)
<?php
$urlParams = array(
'username' => "test",
'password' => strtolower("test"),
'id' => $portfolioName,
'style' => 'JPM'
);
echo str_replace('&', '&', http_build_query($urlParams));