rf3main/html5/views/site/wechat-pay.php

<script src="http://res.wx.qq.com/open/js/jweixin-1.4.0.js" type="text/javascript" charset="utf-8"></script>

<script type="text/javascript" charset="utf-8">
    //数组内为jssdk授权可用的方法，按需添加，详细查看微信jssdk的方法
    wx.config(<?php echo $jssdk->buildConfig(['chooseWXPay'], true) ?>);
    wx.ready(function () {
        // 发起支付
        wx.chooseWXPay({
            timestamp: <?= $config['timestamp'] ?>,
            nonceStr: '<?= $config['nonceStr'] ?>',
            package: '<?= $config['package'] ?>',
            signType: '<?= $config['signType'] ?>',
            paySign: '<?= $config['paySign'] ?>', // 支付签名
            success: function (res) {
                // 支付成功后的回调函数
            }
        });
    });
</script>