微信app支付 php,PHP实现的微信APP支付功能示例【基于TP5框架】

以下是基于TP5框架的微信APP支付功能示例：

1. 首先，在TP5框架的config目录下新建wxpay.php文件，用于存放微信支付相关的配置信息。

<?php

return [
    // 应用ID
    'app_id' => '',
    // 商户号
    'mch_id' => '',
    // API密钥
    'api_key' => '',
    // 异步通知地址
    'notify_url' => '',
    // 交易类型
    'trade_type' => 'APP',
    // 签名类型
    'sign_type' => 'MD5',
];

2. 在TP5框架的extend目录下新建WxPay文件夹，并在该文件夹下新建WxPayApi.php文件，用于封装微信支付相关的接口。

<?php

namespace WxPay;

use think\facade\Log;

/**
 * 微信支付API
 */
class WxPayApi
{
    /**
     * 统一下单接口
     *
     * @param array $data
     * @return array
     */
    public static function unifiedOrder($data)
    {
        $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
        $data['appid'] = config('wxpay.app_id');
        $data['mch_id'] = config('wxpay.mch_id');
        $data['nonce_str'] = self::getNonceStr();
        $data['sign_type'] = config('wxpay.sign_type');
        $data['sign'] = self::makeSign($data);
        $xml = self::toXml($data);
        $response = self::postXmlCurl($xml, $url, true, 6);
        $result = self::fromXml($response);
        if ($result['return_code'] == 'FAIL') {
            Log::error('统一下单失败：' . $result['return_msg']);
            return ['errcode' => 1, 'errmsg' => $result['return_msg']];
        }
        if ($result['result_code'] == 'FAIL') {
            Log::error('统一下单失败：' . $result['err_code_des']);
            return ['errcode' => 1, 'errmsg' => $result['err_code_des']];
        }
        $data = [
            'appid'     => config('wxpay.app_id'),
            'partnerid' => config('wxpay.mch_id'),
            'prepayid'  => $result['prepay_id'],
            'package'   => 'Sign=WXPay',
            'noncestr'  => self::getNonceStr(),
            'timestamp' => time(),
        ];
        $data['sign_type'] = config('wxpay.sign_type');
        $data['sign'] = self::makeSign($data);
        return $data;
    }

    /**
     * 生成签名
     *
     * @param array $data
     * @return string
     */
    public static function makeSign($data)
    {
        ksort($data);
        $string = self::toUrlParams($data);
        $string = $string . '&key=' . config('wxpay.api_key');
        if (config('wxpay.sign_type') == 'MD5') {
            $string = md5($string);
        } elseif (config('wxpay.sign_type') == 'HMAC-SHA256') {
            $string = hash_hmac('sha256', $string, config('wxpay.api_key'));
        }
        return strtoupper($string);
    }

    /**
     * 将数组转换为XML格式
     *
     * @param array $data
     * @return string
     */
    public static function toXml($data)
    {
        $xml = '<xml>';
        foreach ($data as $key => $val) {
            if (is_numeric($val)) {
                $xml .= '<' . $key . '>' . $val . '</' . $key . '>';
            } else {
                $xml .= '<' . $key . '><![CDATA[' . $val . ']]></' . $key . '>';
            }
        }
        $xml .= '</xml>';
        return $xml;
    }

    /**
     * 将XML转换为数组
     *
     * @param string $xml
     * @return array
     */
    public static function fromXml($xml)
    {
        libxml_disable_entity_loader(true);
        $result = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
        return $result;
    }

    /**
     * 生成随机字符串
     *
     * @param int $length
     * @return string
     */
    public static function getNonceStr($length = 32)
    {
        $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
        $nonceStr = '';
        for ($i = 0; $i < $length; $i++) {
            $nonceStr .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $nonceStr;
    }

    /**
     * 将数组转换为URL参数
     *
     * @param array $data
     * @return string
     */
    public static function toUrlParams($data)
    {
        $buff = '';
        foreach ($data as $k => $v) {
            if ($k != 'sign' && $v != '' && !is_array($v)) {
                $buff .= $k . '=' . $v . '&';
            }
        }
        $buff = trim($buff, '&');
        return $buff;
    }

    /**
     * 发送POST请求
     *
     * @param string $xml
     * @param string $url
     * @param bool $useCert
     * @param int $timeout
     * @return bool|string
     */
    public static function postXmlCurl($xml, $url, $useCert = false, $timeout = 30)
    {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:39.0) Gecko/20100101 Firefox/39.0');
        curl_setopt($ch, CURLOPT_HEADER, false);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        if ($useCert) {
            curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM');
            curl_setopt($ch, CURLOPT_SSLCERT, '/path/to/your/cert.pem');
            curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM');
            curl_setopt($ch, CURLOPT_SSLKEY, '/path/to/your/key.pem');
        }
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        $result = curl_exec($ch);
        curl_close($ch);
        return $result;
    }
}

3. 在控制器中调用WxPayApi类的unifiedOrder方法，实现微信支付功能。

<?php

namespace app\index\controller;

use think\Controller;
use WxPay\WxPayApi;

class Index extends Controller
{
    public function index()
    {
        $data = [
            'body'          => '测试商品',
            'out_trade_no'  => date('YmdHis') . mt_rand(10000, 99999),
            'total_fee'     => 1,
            'spbill_create_ip' => $_SERVER['REMOTE_ADDR'],
        ];
        $result = WxPayApi::unifiedOrder($data);
        if ($result['errcode']) {
            return $result['errmsg'];
        }
        return json($result);
    }
}

以上是基于TP5框架的微信APP支付功能示例，具体实现可以根据自己的需要进行调整。