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<?Php function get_md5_string($url){ $arr = explode('?',$url); $params = $arr[1]; $arr = explode('&',$params); foreach($arr as $v){ $tmp = explode('=',$v); $request_arr[$tmp[0]] = $tmp[1]; } ksort($request_arr); $validateString_new =''; foreach($request_arr as $k=>$v){ $validateString_new .= mb_convert_encoding(trim($v),'gbk','gbk'); } $api_key ='123456'; //为商家后台所设置的key值 $validateString_new .= mb_convert_encoding($api_key,'gbk','gbk'); $validateString =md5($validateString_new); $url .='&validateString='.$validateString; return $url; } ?>