- var_dump: documentation ( source)
- urldecode: documentation ( source)
- http_build_query: documentation ( source)
<?php
$date_span = array(
'start' => array('month' => '04', 'day' => '21', 'year' => '2020'),
'end' => array('month' => '04', 'day' => '21', 'year' => '2020'),
);
$date_span_query = http_build_query($date_span);
var_dump($date_span_query);
var_dump(urldecode($date_span_query));