- time: documentation ( source)
- preg_replace: documentation ( source)
- http_build_query: documentation ( source)
<?php
$settings['public_id'] = 'blah';
$settings['timestamp'] = time();
$urlSafeParams = preg_replace("/%5B\d+%5D/", "%5B%5D", http_build_query($settings));
print $urlSafeParams;