修复post方式为x-www-form-urlencodedd方式

Code Review By Rock Zhang

@@ -212,7 +212,16 @@ class Yohobuy
             unset($data['private_key']);
         }
         if (!empty($data)) {
-            curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
+	        // 新加支持application/x-www-form-urlencoded调用方式
+	        $str = '';
+	        foreach ($data as $key => $val) {
+		        $str .= $key . '=' . $val . '&';
+	        }
+
+	        $str = rtrim($str, '&');
+
+//	        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
+	        curl_setopt($ch, CURLOPT_POSTFIELDS, $str);
         }
         $result = curl_exec($ch); 
         if (!$returnJson && !empty($result)) {