View file public_html/aapi.php

<?php
function makeSign($data,$apikey){
ksort ($data);
reset ($data);
foreach($data as $k=>$v){
$data[$k] = trim($v);
}
$s = implode("",$data);
return md5($s.$apikey);
}
$data['acc']='arshadwap';
$data['sdate']='2016-03-01';
$data['edate']='2016-03-31';
$data['metrics']='bimei';
$data['dimensions']='date,pub';
$data['platform']='others';
//$apikey is a fixed string distributed by UC Union.
$apikey='403a9d57eec56b2fbca129e123e2a17e';
$key=makeSign($data,$apikey);
echo $key;
?>