微信的 h5 支付和 jsapi 支付

<?php// 生成32位的APIv3随机密钥$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
echo substr(str_shuffle($chars), 0, $length);

# 初始化文件夹composer init
# 推荐使用 PHP 包管理工具 Composer 安装 SDKcomposer require wechatpay/wechatpay

cd vendor/bin/
php CertificateDownloader.php -k 241xxxxxxxxxxxxxxxxx44 -m 1xxxxxxx1 -f ../../cert/merchant/apiclient_key.pem -s Wxxxxxxxxxxxxxxxx4 -o  ../../cert/wechatpay/

// 判断是否微信浏览器function isWeChat() {    var ua = navigator.userAgent.toLowerCase();    if (ua.match(/MicroMessenger/i) == 'micromessenger') {        return true;    } else {        return false;    }}
if(isWeChat()) {    // 是微信中打开的产品页面    alert('微信内不支持h5支付，请在外部浏览器打开页面');} else {    // 非微信内打开的产品页面，请求接口，获取支付的跳转链接    // 前端用户选的产品，以及产品的金额，传一些参数过去    let params = {        total: 2, // 单位：元        description: 'Image形象店-深圳腾大-QQ公仔' // 产品的介绍        // ....更多入库参数    };        $.getJSON('后端接口地址/h5?' + $.param(params) + '&callback=?', function(res) {        // 拉起微信支付界面，成功后会跳转到redirect_url链接        $(location).attr("href", res.data.h5_url + "&redirect_url=" + encodeURIComponent(`https://xxxxxx/finish?out_trade_no=${res.data.out_trade_no}`))    });}

<?php// 仅仅用作展示，不可直接复制使用require_once('../vendor/autoload.php');
use WeChatPay\Builder;use WeChatPay\Crypto\Rsa;use WeChatPay\Util\PemUtil;
// 接受参数，相当于原生的$_GET$input = $request->only(['name', 'total', 'description', 'phone']);
// 生成商户订单号$out_trade_no = getOutTradeNo();
// 处理金额// 由于微信使用的是分作为单位，所以前端传的是元的话，需要转换一下$total = $input['total'] * 100;
// 商户号$merchantId = '1xxxxxx1';
// 从本地文件中加载「商户API私钥」，「商户API私钥」会用来生成请求的签名$merchantPrivateKeyFilePath = 'file://../cert/merchant/apiclient_key.pem';$merchantPrivateKeyInstance = Rsa::from($merchantPrivateKeyFilePath, Rsa::KEY_TYPE_PRIVATE);
// 「商户API证书」的「证书序列号」$merchantCertificateSerial = '1xxxxxxxxxxxxxxxxxxxxx91';
// 从本地文件中加载「微信支付平台证书」，用来验证微信支付应答的签名$platformCertificateFilePath = 'file://../cert/wechatpay/wechatpay_4xxxxxxxxxxxxxxxxxxx9.pem';$platformPublicKeyInstance = Rsa::from($platformCertificateFilePath, Rsa::KEY_TYPE_PUBLIC);
// 从「微信支付平台证书」中获取「证书序列号」$platformCertificateSerial = PemUtil::parseCertificateSerialNo($platformCertificateFilePath);
// 构造一个 APIv3 客户端实例$instance = Builder::factory([    'mchid'      => $merchantId,    'serial'     => $merchantCertificateSerial,    'privateKey' => $merchantPrivateKeyInstance,    'certs'      => [        $platformCertificateSerial => $platformPublicKeyInstance,    ],]);

try {    $resp = $instance        ->chain('v3/pay/transactions/h5')        ->post(['json' => [            'mchid'        => $merchantId, // 商户号            'out_trade_no' => $out_trade_no, // 商户订单号            'appid'        => '********换成跟商户号绑定的公众号APPID**********',            'description'  => $input['description'], //商品描述            'notify_url'   => 'https://xxxxx/notify', // 用户支付后的回调地址，在这里修改订单的状态            'amount'       => [                'total'    => $total, // 微信处理的单位是分                'currency' => 'CNY'            ],            'scene_info' => [                'payer_client_ip' => getClientIP(), // 有些框架有自带获取获取客户端IP                'h5_info' => [                    'type' => 'Wap'                ]            ]        ]]);                   // 如果请求成功，需要将一些参数进行入库，这里仅作演示，非正式数据入库   $response = Db::table('order')->insert([       'name' => $input['name'],       'description' => $input['description'],       'total' => $input['total'],       'phone' => $input['phone'],       'trade_state' => 'START',   ]);      // 入库成功后，将跳转链接和订单号传给前端，前端拿到跳转地址跳转即可   if($response) {       return jsonp([        'code' => 200,        'msg' => '操作成功',        'data' => [              'out_trade_no' => $out_trade_no,              'h5_url' => json_decode($resp->getBody(), true)['h5_url']           ]        ]);   } else {       return jsonp([        'code' => 100,        'msg' => '操作失败'       ]);   }} catch (\Exception $e) {    // 进行错误处理    if ($e instanceof \GuzzleHttp\Exception\RequestException && $e->hasResponse()) {        $r = $e->getResponse();        echo $r->getBody(), PHP_EOL, PHP_EOL, PHP_EOL;    }}

// 生成唯一商户订单号，订单号不能超过32位，并且在同一个商户下订单号不能重复// 如果并发不高，基本这样生成就可以，不会有重复的情况出现的function getOutTradeNo(){    $out_trade_no = date('ymdHis') . mt_rand(1000, 9999) . uniqid();    return mb_substr($out_trade_no, 0, 32);}
// 获取客户端的IPfunction getClientIP(){    if (@$_SERVER["HTTP_ALI_CDN_REAL_IP"]) {        $ip = $_SERVER["HTTP_ALI_CDN_REAL_IP"];    } elseif (@$_SERVER["HTTP_X_FORWARDED_FOR"] ?: false) {        $ips = explode(',', $_SERVER["HTTP_X_FORWARDED_FOR"]);        $ip = $ips[0];    } elseif (@$_SERVER["HTTP_CDN_SRC_IP"] ?: false) {        $ip = $_SERVER["HTTP_CDN_SRC_IP"];    } elseif (getenv('HTTP_CLIENT_IP')) {        $ip = getenv('HTTP_CLIENT_IP');    } elseif (getenv('HTTP_X_FORWARDED')) {        $ip = getenv('HTTP_X_FORWARDED');    } elseif (getenv('HTTP_FORWARDED_FOR')) {        $ip = getenv('HTTP_FORWARDED_FOR');    } elseif (getenv('HTTP_FORWARDED')) {        $ip = getenv('HTTP_FORWARDED');    } else {        $ip = $_SERVER['REMOTE_ADDR'];    }
    $ip = str_replace(['::ffff:', '[', ']'], ['', '', ''], $ip);    return $ip;}

<?php// 回调处理，当用户支付订单后，微信会请求该接口，也就是上面在notify_url中填写的接口// 在这里我们可以修改订单的状态啥的public function notify(){    // 获取参数    $inBody = file_get_contents('php://input');
    // APIv3密钥    $apiv3Key = 'xxxxxxxxxxxx';
    // 转换通知的JSON文本消息为PHP Array数组    $inBodyArray = (array)json_decode($inBody, true);        // 加密文本消息解密    $inBodyResource = AesGcm::decrypt(        $inBodyArray['resource']['ciphertext'],        $apiv3Key,        $inBodyArray['resource']['nonce'],        $inBodyArray['resource']['associated_data']    );
    // 把解密后的文本转换为PHP Array数组    $inBodyResourceArray = (array)json_decode($inBodyResource, true);
    try {        // 获取订单信息        $order = Db::table('order')->where('out_trade_no', $inBodyResourceArray['out_trade_no'])->first();
        Db::startTrans();        if ($order) {            // 修改order订单的状态            Db::table('order')->where('id', $order['id'])->update([                'openid' => $inBodyResourceArray['payer']['openid'],                'trade_state' => $inBodyResourceArray['trade_state']            ]);                                    Db::table('payment')->insert([                 'out_trade_no' => $inBodyResourceArray['out_trade_no'],                'transaction_id' => $inBodyResourceArray['transaction_id'],                'trade_type' => $inBodyResourceArray['trade_type'],                'trade_state' => $inBodyResourceArray['trade_state'],                'trade_state_desc' => $inBodyResourceArray['trade_state_desc'],                'total_amount' => $inBodyResourceArray['amount']['total'],                'bank_type' => $inBodyResourceArray['bank_type'],                'success_time' => strtotime($inBodyResourceArray['success_time'])            ]);
            Db::commit();        } else {            Db::rollback();        }    } catch (\Exception $e) {        Db::rollback();    }}

// a页面，仅做逻辑演示，更加具体的逻辑需要自己完善// 判断是否微信浏览器function isWeChat() {    var ua = navigator.userAgent.toLowerCase();    if (ua.match(/MicroMessenger/i) == 'micromessenger') {        return true;    } else {        return false;    }}
if(!isWeChat()) {    // 非微信内打开的产品页面    alert('微信外不支持JSAPI支付，请在微信中打开页面');    return false;}
// 用户挑选完商品后跳转，这里appid需要上面跟商户绑定的公众号appid// 微信授权分为静默授权和非静默授权，其中非静默授权，需要用户点击确认授权后，才可以获取code，// 因为这里主打一个用户无感知，而且我们只需要openid即可，所以我们只需要使用静默授权即可// 静默授权可以获取用户更多的信息，比如头像、昵称等，而静默授权只能获取openid，这点需要注意，具体情况选择不同// 非静默授权// $(location).attr('href', `https://open.weixin.qq.com/connect/oauth2/authorize?appid=xxxxxxxxxxx&redirect_uri=${encodeURIComponent('https://xxxx/b.html')}&response_type=code&scope=snsapi_userinfo#wechat_redirect`)// 静默授权$(location).attr('href', `https://open.weixin.qq.com/connect/oauth2/authorize?appid=xxxxxxxxxxx&redirect_uri=${encodeURIComponent('https://xxxx/b.html')}&response_type=code&scope=snsapi_base#wechat_redirect`)

// b页面，仅做逻辑演示，更加具体的逻辑需要自己完善let openid = '';
// 获取code, 请求接口获取openidfunction getParamUrl(name, url) {  if (!url) url = location.href;  if (url.indexOf('?') == -1) return '';
  try {    var re = new RegExp("" + name + "=([^&?]*)", "ig");    return ((url.match(re)) ? (decodeURIComponent(url.match(re)[0].substr(name.length + 1))) : '');  } catch (_e) {    return '';  }}
let code = getParamUrl('code');
$.getJSON('后端接口地址/openid?callback=?', function(res) {    if(res.code == 200) {        openid = res.data;    } else {        console.error(res.msg);    }})
// 用户确定订单后，拉起支付let params = {    total: 2, // 单位：元    description: 'Image形象店-深圳腾大-QQ公仔', // 产品的介绍    openid: openid //用户的openid    // ....更多入库参数};
$.getJSON('后端接口地址/jssapi?' + $.param(params) + '&callback=?', function(res) {    WeixinJSBridge.invoke('getBrandWCPayRequest', {      'appId': res.data.sign.appId,      'timeStamp': res.data.sign.timeStamp,      'nonceStr': res.data.sign.nonceStr,      'package': res.data.sign.package,      'signType': res.data.sign.signType,      'paySign': res.data.sign.paySign    }, function (response) {      if (response.err_msg == "get_brand_wcpay_request:ok") {        $(location).attr("href", `https://xxxxxx/finish?out_trade_no=${res.data.out_trade_no}`)      } else {        // 有些用户调起了支付，但是未付款取消的处理方式，你可以给他简单简单提示        toast('支付异常取消')
        // 当然有些用户是误操作，你可以提醒二次支付        if(confirm('检测到你操作有误，是否重新支付?')) {            WeixinJSBridge.invoke('getBrandWCPayRequest', {                  'appId': res.data.sign.appId,                  'timeStamp': res.data.sign.timeStamp,                  'nonceStr': res.data.sign.nonceStr,                  'package': res.data.sign.package,                  'signType': res.data.sign.signType,                  'paySign': res.data.sign.paySign                }, function (response) {                if (response.err_msg == "get_brand_wcpay_request:ok") {                    $(location).attr("href", `https://xxxxxx/finish?out_trade_no=${res.data.out_trade_no}`)                }            })        }      }    });});

<?php// 获取用户的openid
$input = $request->only(['code']);
$response = getCurl("https://api.weixin.qq.com/sns/oauth2/access_token?appid={$this->appid}&secret={$this->secret}&code={$input['code']}&grant_type=authorization_code");
$openid = json_decode($response, true)['openid'];
// 返回openidreturn jsonp([    'code' => 200,    'msg' => '获取成功',    'data' => $openid]);

// 封装的GET请求function getCurl($url, $timeout = 5){    $ch = curl_init();    curl_setopt($ch, CURLOPT_URL, $url);    curl_setopt($ch, CURLOPT_HEADER, 0);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);    $result = curl_exec($ch);    curl_close($ch);
    return $result;}

<?php// 仅仅用作展示，不可直接复制使用require_once('../vendor/autoload.php');
use WeChatPay\Builder;use WeChatPay\Formatter;use WeChatPay\Crypto\Rsa;use WeChatPay\Util\PemUtil;
// 接受参数，相当于原生的$_GET，这里会比h5支付多一个openid$input = $request->only(['openid', 'name', 'total', 'description', 'phone']);
// 生成商户订单号$out_trade_no = getOutTradeNo();
// 处理金额// 由于微信使用的是分作为单位，所以前端传的是元的话，需要转换一下$total = $input['total'] * 100;
// 商户号$merchantId = '1xxxxxx1';
// 从本地文件中加载「商户API私钥」，「商户API私钥」会用来生成请求的签名$merchantPrivateKeyFilePath = 'file://../cert/merchant/apiclient_key.pem';$merchantPrivateKeyInstance = Rsa::from($merchantPrivateKeyFilePath, Rsa::KEY_TYPE_PRIVATE);
// 「商户API证书」的「证书序列号」$merchantCertificateSerial = '1xxxxxxxxxxxxxxxxxxxxx91';
// 从本地文件中加载「微信支付平台证书」，用来验证微信支付应答的签名$platformCertificateFilePath = 'file://../cert/wechatpay/wechatpay_4xxxxxxxxxxxxxxxxxxx9.pem';$platformPublicKeyInstance = Rsa::from($platformCertificateFilePath, Rsa::KEY_TYPE_PUBLIC);
// 从「微信支付平台证书」中获取「证书序列号」$platformCertificateSerial = PemUtil::parseCertificateSerialNo($platformCertificateFilePath);
// 构造一个 APIv3 客户端实例$instance = Builder::factory([    'mchid'      => $merchantId,    'serial'     => $merchantCertificateSerial,    'privateKey' => $merchantPrivateKeyInstance,    'certs'      => [        $platformCertificateSerial => $platformPublicKeyInstance,    ],]);

try {    // 调用 transactions/jsapi 接口后会生成prepay_id    $resp = $this->instance()        ->chain('v3/pay/transactions/jsapi')        ->post(['json' => [            'mchid'        => $merchantId, // 商户号            'out_trade_no' => $out_trade_no, // 商户订单号            'appid'        => '********换成跟商户号绑定的公众号APPID**********',            'description'  => $input['description'], //商品描述            'notify_url'   => 'https://xxxxx/notify', // 用户支付后的回调地址，在这里修改订单的状态            'amount' => [                'total' => $total,                'currency' => 'CNY'            ],            'payer' => [                'openid' => $input['openid']            ]        ]]);            // 需要根据prepay_id去生成加密的信息    $prepay_id = json_decode($resp->getBody(), true)['prepay_id'];    $sign = getSign($prepay_id);           // 如果请求成功，需要将一些参数进行入库，这里仅作演示，非正式数据入库   $response = Db::table('order')->insert([       'openid' => $input['openid'],       'name' => $input['name'],       'description' => $input['description'],       'total' => $input['total'],       'phone' => $input['phone'],       'trade_state' => 'START',   ]);      // 入库成功后，将跳转链接和订单号传给前端，前端拿到跳转地址跳转即可   if($response) {       return jsonp([        'code' => 200,        'msg' => '操作成功',        'data' => [              'out_trade_no' => $out_trade_no,              'sign' => $sign           ]        ]);   } else {       return jsonp([        'code' => 100,        'msg' => '操作失败'       ]);   }} catch (\Exception $e) {    // 进行错误处理    if ($e instanceof \GuzzleHttp\Exception\RequestException && $e->hasResponse()) {        $r = $e->getResponse();        echo $r->getBody(), PHP_EOL, PHP_EOL, PHP_EOL;    }}
// 获取加密参数function getSign($prepay_id){    $merchantPrivateKeyInstance = Rsa::from($this->merchantPrivateKeyFilePath);
    $params = [        'appId' => $this->appid,        'timeStamp' => (string)Formatter::timestamp(),        'nonceStr' => Formatter::nonce(),        'package' => 'prepay_id=' . $prepay_id,    ];
    $params += ['paySign' => Rsa::sign(        Formatter::joinedByLineFeed(...array_values($params)),        $merchantPrivateKeyInstance    ), 'signType' => 'RSA'];
    return $params;}

<?php/** * User: tinygeeker * Desc: 微信支付库封装 * Date: 2023/08/10 */
namespace App;
use App\Helper;use WeChatPay\Builder;use WeChatPay\Formatter;use WeChatPay\Crypto\Rsa;use WeChatPay\Util\PemUtil;
class WxPay{    // appid    private $appid;
    // 商户号    private $merchantId;
    // 商户API私钥    private $merchantPrivateKeyFilePath;
    // 证书序列号    private $merchantCertificateSerial;
    // 微信支付平台证书    private $platformCertificateFilePath;
    /**     * @param $appid     * @param $merchantId     * @param $merchantCertificateSerial     */    public function __construct($appid = '', $merchantId = '', $merchantCertificateSerial = '')    {        $this->appid = $appid ?: '换成自己的APPID';        $this->merchantId = $merchantId ?: '换成自己的商户号';        $this->merchantCertificateSerial = $merchantCertificateSerial ?: '换成自己的证书序列号';
        $this->merchantPrivateKeyFilePath = 'file:///common/cert/merchant/apiclient_key.pem'; // 换成自己的        $this->platformCertificateFilePath = 'file:///common/cert/wechatpay/wechatpay_xxx.pem'; // 换成自己的    }
    /**     * @return \WeChatPay\BuilderChainable     */    protected function instance()    {        $merchantPrivateKeyInstance = Rsa::from($this->merchantPrivateKeyFilePath, Rsa::KEY_TYPE_PRIVATE);        $platformPublicKeyInstance = Rsa::from($this->platformCertificateFilePath, Rsa::KEY_TYPE_PUBLIC);
        $platformCertificateSerial = PemUtil::parseCertificateSerialNo($this->platformCertificateFilePath);
        $instance = Builder::factory([            'mchid' => $this->merchantId,            'serial' => $this->merchantCertificateSerial,            'privateKey' => $merchantPrivateKeyInstance,            'certs' => [                $platformCertificateSerial => $platformPublicKeyInstance,            ],        ]);
        return $instance;    }
    public function getSign($prepay_id)    {        $merchantPrivateKeyInstance = Rsa::from($this->merchantPrivateKeyFilePath);
        $params = [            'appId' => $this->appid,            'timeStamp' => (string)Formatter::timestamp(),            'nonceStr' => Formatter::nonce(),            'package' => 'prepay_id=' . $prepay_id,        ];
        $params += ['paySign' => Rsa::sign(            Formatter::joinedByLineFeed(...array_values($params)),            $merchantPrivateKeyInstance        ), 'signType' => 'RSA'];
        return $params;    }
    public function checkOutTradeNo($out_trade_no)    {        try {            $resp = $this->instance()                ->v3->pay->transactions->outTradeNo->_out_trade_no_                ->get([                    // Query 参数                    'query' => ['mchid' => $this->merchantId],                    // 变量名 => 变量值                    'out_trade_no' => $out_trade_no,                ]);
            return $resp->getBody();        } catch (\Exception $e) {            // 进行错误处理            echo $e->getMessage(), PHP_EOL;            if ($e instanceof \GuzzleHttp\Exception\RequestException && $e->hasResponse()) {                $r = $e->getResponse();                echo $r->getStatusCode() . ' ' . $r->getReasonPhrase(), PHP_EOL;                echo $r->getBody(), PHP_EOL, PHP_EOL, PHP_EOL;            }            echo $e->getTraceAsString(), PHP_EOL;        }    }        // h5下单    public function h5($total, $out_trade_no, $description, $notify_url)    {        try {            $resp = $this->instance()                ->chain('v3/pay/transactions/h5')                ->post(['json' => [                    'mchid' => $this->merchantId,                    'out_trade_no' => $out_trade_no,                    'appid' => $this->appid,                    'description' => $description,                    'notify_url' => $notify_url,                    'amount' => [                        'total' => $total,                        'currency' => 'CNY'                    ],                    'scene_info' => [                        'payer_client_ip' => Helper::getClientIp(),                        'h5_info' => [                            'type' => 'Wap'                        ]                    ]                ]]);
            return $resp->getBody();        } catch (\Exception $e) {            // 进行错误处理            echo $e->getMessage(), PHP_EOL;            if ($e instanceof \GuzzleHttp\Exception\RequestException && $e->hasResponse()) {                $r = $e->getResponse();                echo $r->getStatusCode() . ' ' . $r->getReasonPhrase(), PHP_EOL;                echo $r->getBody(), PHP_EOL, PHP_EOL, PHP_EOL;            }            echo $e->getTraceAsString(), PHP_EOL;        }    }        // jsapi下单    public function jsapi($openid, $total, $out_trade_no, $description, $notify_url)    {        try {            $resp = $this->instance()                ->chain('v3/pay/transactions/jsapi')                ->post(['json' => [                    'mchid' => $this->merchantId,                    'out_trade_no' => $out_trade_no,                    'appid' => $this->appid,                    'description' => $description,                    'notify_url' => $notify_url,                    'amount' => [                        'total' => $total,                        'currency' => 'CNY'                    ],                    'payer' => [                        'openid' => $openid                    ]                ]]);
            return $resp->getBody();        } catch (\Exception $e) {            // 进行错误处理            echo $e->getMessage(), PHP_EOL;            if ($e instanceof \GuzzleHttp\Exception\RequestException && $e->hasResponse()) {                $r = $e->getResponse();                echo $r->getStatusCode() . ' ' . $r->getReasonPhrase(), PHP_EOL;                echo $r->getBody(), PHP_EOL, PHP_EOL, PHP_EOL;            }            echo $e->getTraceAsString(), PHP_EOL;        }    }           // todo... 更多接口可根据官方文档列表自行添加}

<?php/** * User: tinygeeker * Desc: 工具库 * Date: 2023/08/10 */ namespace App;
class Helper{    /**     * @return array|mixed|string|string[]     */    static public function getClientIP()    {        if (@$_SERVER["HTTP_ALI_CDN_REAL_IP"]) {            $ip = $_SERVER["HTTP_ALI_CDN_REAL_IP"];        } elseif (@$_SERVER["HTTP_X_FORWARDED_FOR"] ?: false) {            $ips = explode(',', $_SERVER["HTTP_X_FORWARDED_FOR"]);            $ip = $ips[0];        } elseif (@$_SERVER["HTTP_CDN_SRC_IP"] ?: false) {            $ip = $_SERVER["HTTP_CDN_SRC_IP"];        } elseif (getenv('HTTP_CLIENT_IP')) {            $ip = getenv('HTTP_CLIENT_IP');        } elseif (getenv('HTTP_X_FORWARDED')) {            $ip = getenv('HTTP_X_FORWARDED');        } elseif (getenv('HTTP_FORWARDED_FOR')) {            $ip = getenv('HTTP_FORWARDED_FOR');        } elseif (getenv('HTTP_FORWARDED')) {            $ip = getenv('HTTP_FORWARDED');        } else {            $ip = $_SERVER['REMOTE_ADDR'];        }
        $ip = str_replace(['::ffff:', '[', ']'], ['', '', ''], $ip);        return $ip;    }
    /**     * @param $length     * @param $type     * @return false|string     */    static public function createRandomStr($length = 32, $type = 0)    {        switch ($type) {            case 1:                $chars = '0123456789';                break;            case 2:                $chars = 'abcdefghijklmnopqrstuvwxyz';                break;            case 3:                $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';                break;            case 4:                $chars = 'abcdefghijklmnopqrstuvwxyz0123456789';                break;            case 5:                $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';                break;            default:                $chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';                break;        }
        return substr(str_shuffle($chars), 0, $length);    }
    /**     * @param $url     * @param $timeout     * @return bool|string     */    static public function getCurl($url, $timeout = 5)    {        $ch = curl_init();        curl_setopt($ch, CURLOPT_URL, $url);        curl_setopt($ch, CURLOPT_HEADER, 0);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);        $result = curl_exec($ch);        curl_close($ch);
        return $result;    }
    /**     * @param $url     * @param $data     * @param $header     * @param $timeout     * @return bool|string     */    static public function postCurl($url, $data, $header = [], $timeout = 5)    {        $ch = curl_init();        curl_setopt($ch, CURLOPT_URL, $url);        if ($header) {            curl_setopt($ch, CURLOPT_HTTPHEADER, $header);        }        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);        curl_setopt($ch, CURLOPT_POST, 1);        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);        $result = curl_exec($ch);        curl_close($ch);
        return $result;    }}