在使用插件之前，请配置好交通银行在线支付的环境（具体安装方法，交行提供的demo会有，也不是很难，注意好细节就行）。安装好之后，请将把下面的插件源码和语言包源码按路径保存到相应文件，最后进入后台的支付模块安装即可。

插件源码（includes/modules/payment/bankcomm.php）:

<?php
/**
* 交通银行在线支付插件 For Ecshop
* Author: Reson
* Date: 2014/03/31
*/

if (!defined('IN_ECS'))
{
die('Hacking attempt');
}

$payment_lang = ROOT_PATH . 'languages/' .$GLOBALS['_CFG']['lang']. '/payment/bankcomm.php';

if (file_exists($payment_lang))
{
global $_LANG;
include_once($payment_lang);
}

/* 模块的基本信息 */
if (isset($set_modules) && $set_modules == TRUE)
{
$i = isset($modules) ? count($modules) : 0;

/* 代码 */
$modules[$i]['code'] = basename(__FILE__, '.php');

/* 描述对应的语言项 */
$modules[$i]['desc'] = 'bankcomm_desc';

/* 是否支持货到付款 */
$modules[$i]['is_cod'] = '0';

/* 是否支持在线支付 */
$modules[$i]['is_online'] = '1';

/* 支付费用，由配送决定 */
$modules[$i]['pay_fee'] = '0';

/* 作者 */
$modules[$i]['author'] = 'Reson';

/* 网址 */
$modules[$i]['website'] = '//www.jb51.net';

/* 版本号 */
$modules[$i]['version'] = '1.0.0.0';

/* 配置信息 */
$modules[$i]['config'] = array();

return;
}

/**
* 类
*/
class bankcomm
{
/**
* 构造函数
*
* @return void
*/
function bankcomm()
{
}

function __construct()
{
$this->bankcomm();
}

/**
* 提交函数
*/
function get_code($order)
{
//获得表单传过来的数据
$param['interfaceVersion'] = '1.0.0.0'; //消息版本号*
$param['merID'] = '301310063009501'; //商户号 (测试号,后期可自行更改)
$param['orderid'] = $order['orderid']; //订单号*
$param['orderDate'] = local_date("Ymd",gmtime()); //商户订单日期* yyyyMMdd
$param['orderTime'] = local_date("His",gmtime()); //商户订单时间* HHmmss
$param['tranType'] = 0; //交易类别* 0:B2C
$param['amount'] = $order['amount']; //订单金额*
$param['curType'] = 'CNY'; //交易币种* 默认CNY
$param['orderContent'] = '';
$param['orderMono'] = $order['orderMono']; //商家备注
$param['phdFlag'] = ''; //物流配送标志
$param['notifyType'] = 1; //通知方式* 1 通知
$param['merURL'] = '';
$param['goodsURL'] = $order['goodsURL']; //取货URL
$param['jumpSeconds'] = '';
$param['payBatchNo'] = '';
$param['proxyMerName'] = '';
$param['proxyMerType'] = '';
$param['proxyMerCredentials'] = '';
$param['netType'] = 0; //渠道编号* 0:html渠道
$param['issBankNo'] = '';

$tranCode = "cb2200_sign";

htmlentities($param['orderMono'],"ENT_QUOTES","utf-8");
//连接字符串
$source = '';
foreach($param as $key=>$val){
if($key != 'issBankNo')
$source .= $val.'|';
}
$source = substr($source,0,strlen($source)-1);

//连接地址
$socketUrl = "tcp://127.0.0.1:8080"; //这里的端口根据自己配置的情况
$fp = stream_socket_client($socketUrl, $errno, $errstr, 30);
$retMsg="";
//
if (!$fp) {
echo "$errstr ($errno)<br />\n";
} else
{
$in = "<?xml version='1.0' encoding='UTF-8'?>";
$in .= "<Message>";
$in .= "<TranCode>".$tranCode."</TranCode>";
$in .= "<MsgContent>".$source."</MsgContent>";
$in .= "</Message>";
fwrite($fp, $in);
while (!feof($fp)) {
$retMsg =$retMsg.fgets($fp, 1024);
}
fclose($fp);
}
//解析返回xml
$dom = new DOMDocument;
$dom->loadXML($retMsg);

$retCode = $dom->getElementsByTagName('retCode');
$retCode_value = $retCode->item(0)->nodeValue;

$errMsg = $dom->getElementsByTagName('errMsg');
$errMsg_value = $errMsg->item(0)->nodeValue;

$signMsg = $dom->getElementsByTagName('signMsg');
$signMsg_value = $signMsg->item(0)->nodeValue;

$orderUrl = $dom->getElementsByTagName('orderUrl');
$orderUrl_value = $orderUrl->item(0)->nodeValue;

$MerchID = $dom->getElementsByTagName('MerchID');
$merID = $MerchID->item(0)->nodeValue;
//echo "retMsg=".$retMsg;
//echo $retCode_value." ".$errMsg_value." ".$signMsg_value." ".$orderUrl_value;
if($retCode_value != "0"){
//echo "交易返回码：".$retCode_value."<br>";
//echo "交易错误信息：" .$errMsg_value."<br>";
return "交易错误信息：" .$errMsg_value."<br>";
}else{
$param['signMsg_value'] = $signMsg_value;
$param['orderUrl_value'] = $orderUrl_value;
$form_code = $this->create_html($param); //创建提交表单
return $form_code;
}

}

/**
* 创建提交表单
*/
function create_html($param){
$pay_html ='<form name = "form1" method = "post" action = "'.$param['orderUrl_value'].'">
<input type = "hidden" name = "interfaceVersion" value = "'.$param['interfaceVersion'].'">
<input type = "hidden" name = "merID" value = "'.$param['merID'].'">
<input type = "hidden" name = "orderid" value = "'.$param['orderid'].'">
<input type = "hidden" name = "orderDate" value = "'.$param['orderDate'].'">
<input type = "hidden" name = "orderTime" value = "'.$param['orderTime'].'">
<input type = "hidden" name = "tranType" value = "'.$param['tranType'].'">
<input type = "hidden" name = "amount" value = "'.$param['amount'].'">
<input type = "hidden" name = "curType" value = "'.$param['curType'].'">
<input type = "hidden" name = "orderContent" value = "'.$param['orderContent'].'">
<input type = "hidden" name = "orderMono" value = "'.$param['orderMono'].'">
<input type = "hidden" name = "phdFlag" value = "'.$param['phdFlag'].'">
<input type = "hidden" name = "notifyType" value = "'.$param['notifyType'].'">
<input type = "hidden" name = "merURL" value = "'.$param['merURL'].'">
<input type = "hidden" name = "goodsURL" value = "'.$param['goodsURL'].'">
<input type = "hidden" name = "jumpSeconds" value = "'.$param['jumpSeconds'].'">
<input type = "hidden" name = "payBatchNo" value = "'.$param['payBatchNo'].'">
<input type = "hidden" name = "proxyMerName" value = "'.$param['proxyMerName'].'">
<input type = "hidden" name = "proxyMerType" value = "'.$param['proxyMerType'].'">
<input type = "hidden" name = "proxyMerCredentials" value = "'.$param['proxyMerCredentials'].'">
<input type = "hidden" name = "netType" value = "'.$param['netType'].'">
<input type = "hidden" name = "merSignMsg" value = "'.$param['signMsg_value'].'">
<input type = "hidden" name = "issBankNo" value = "'.$param['issBankNo'].'">

<input type="submit" value=" " class="pay_button" />
</form>';
return $pay_html;
}

/**
* 处理函数
*/
function respond()
{
$tranCode = "cb2200_verify";
$notifyMsg = $_REQUEST["notifyMsg"];
$lastIndex = strripos($notifyMsg,"|");
$signMsg = substr($notifyMsg,$lastIndex+1); //签名信息
$srcMsg = substr($notifyMsg,0,$lastIndex+1);//原文

//连接地址
$socketUrl = "tcp://127.0.0.1:8080";
$fp = stream_socket_client($socketUrl, $errno, $errstr, 30);
$retMsg="";
if (!$fp) {
//echo "$errstr ($errno)<br />\n";
return false;
}else{
$in = "<?xml version='1.0' encoding='UTF-8'?>";
$in .= "<Message>";
$in .= "<TranCode>".$tranCode."</TranCode>";
$in .= "<MsgContent>".$notifyMsg."</MsgContent>";
$in .= "</Message>";
fwrite($fp, $in);
while (!feof($fp)) {
$retMsg =$retMsg.fgets($fp, 1024);
}
fclose($fp);
}

//解析返回xml
$dom = new DOMDocument;
$dom->loadXML($retMsg);

$retCode = $dom->getElementsByTagName('retCode');
$retCode_value = $retCode->item(0)->nodeValue;

$errMsg = $dom->getElementsByTagName('errMsg');
$errMsg_value = $errMsg->item(0)->nodeValue;

$signMsg = $dom->getElementsByTagName('signMsg');
$signMsg_value = $signMsg->item(0)->nodeValue;

if($retCode_value != ''){
//echo "交易返回码：".$retCode_value."<br>";
//echo "交易错误信息：" .$errMsg_value."<br>";
return false;
}else{
$arr = preg_split("/\|{1,}/",$srcMsg);
$pay_id = $arr[1];
$action_note = base64_decode($arr[16]);
// 完成订单。
order_paid($pay_id, PS_PAYED, $action_note);
//告诉用户交易完成
return true;
}

///////////////// respond END ///////////////
}

}

?>

语言包源码（languages/zh_cn/payment/bankcomm.php）:

<?php
/**
* 交通银行语言文件
* by: Reson
* 2014/03/31
*/

global $_LANG;

$_LANG['bankcomm'] = '交通银行在线支付';
$_LANG['bankcomm_desc'] = '交通银行在线支付';
$_LANG['pay_button'] = '交通银行支付';

?>

以下是调用的范例：

include_once(ROOT_PATH . 'includes/modules/payment/bankcomm.php');
$order_['orderid'] = $order['order_sn'];
$order_['amount'] = $order['yd_price'];
$order_['orderMono'] = '测试'; //商家备注
$order_['goodsURL'] = "http://".$_SERVER['HTTP_HOST'].'/respond.php?code=bankcomm'; //取货URL
$pay_code = new bankcomm;
$pay_button = $pay_code->get_code($order_);
$order['pay_button'] = $pay_button; //即此时已经生成了一个支付按钮