ECStore 签名算法

<?php 
function get_sign($params,$token){ 
    return strtoupper(md5(strtoupper(md5(assemble($params))).$token)); 
} 
function assemble($params) 
{ 
    if(!is_array($params))  return null; 
    ksort($params,SORT_STRING); 
    $sign = ‘‘; 
    foreach($params AS $key=>$val){ 
        $sign .= $key . (is_array($val) ? assemble($val) : $val); 
    } 
    return $sign; 
} 
?>