微信开发总结

一.微信消息接收消息

1.yii2中接收token验证及事件处理

$echostr = Yii::$app->request->get('echostr', '');
//微信服务器发来的验证
if (!empty($echostr)) {
    // 验证来源
       if ($this->checkSignature()) {
           print_r($echostr);
       }
} else {
    //用户发来的消息处理
    $this->responseMsg();
}
Yii::$app->end();

/**
 * 验证微信服务器
 * @return bool
 */
public function checkSignature()
{
    $signature = $_GET["signature"];
    $timestamp = $_GET["timestamp"];
    $nonce = $_GET["nonce"];

    $token = 'token';

    $tmpArr = array($token, $timestamp, $nonce);
    sort($tmpArr);
    $tmpStr = implode($tmpArr);
    $tmpStr = sha1($tmpStr);

    if ($tmpStr == $signature) {
        return true;
    } else {
        return false;
    }
}

2.微信事件处理

public function responseMsg()
{
    $postStr = file_get_contents("php://input");
    if (!empty($postStr)) {
        libxml_disable_entity_loader(true);
        $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
        $form_MsgType = $postObj->MsgType;
        // 事件消息
        if ($form_MsgType == "event") {
            // 获取事件类型
            $form_Event = $postObj->Event;
            if ($form_Event == "subscribe") {
                // 关注
                if (!empty($postObj->Ticket)) {
                    // 扫二维码关注
                } else {
                    // 自然关注
                }
            }elseif ($form_Event == "unsubscribe") {
                // 取关
                echo "";
            }
        }
    } else {
        echo "";
    }
}

3.生成带二维码图片

/**
 * 缩放图片
 * @param $src_file
 * @param float $per
 * @return resource
 */
public static function thrum($src_file, $per)
{
    $filename = $src_file;
    list($width, $height) = getimagesize($filename);
    $n_w = $width * $per;
    $n_h = $height * $per;
    $new = imagecreatetruecolor($n_w, $n_h);
    $img = imagecreatefromjpeg($filename);
    imagecopyresized($new, $img, 0, 0, 0, 0, $n_w, $n_h, $width, $height);
    return $new;
}

/**
 * 合成图片
 * @param $path1
 * @param $path2
 * @param $x
 * @param $y
 * @param $per
 * @return string
 */
public static function compose($path1, $path2, $x, $y, $per)
{
    $path_1 = $path1;
    $path_2 = str_replace('https', 'http', $path2); // 无配置ssl的环境不能解析https，如有需要需强转成http
    $image_1 = imagecreatefrompng($path_1); // 获取图片
    $image_2 = self::thrum($path_2, $per); // 压缩图片
    imagecopymerge($image_1, $image_2, $x, $y, 0, 0, imagesx($image_2), imagesy($image_2), 100); // 合成到image1
    $fileName = uniqid() . time() . rand(1000, 9999) . '.png'; // 生成唯一图片名
    $savePath = \Yii::$app->getRuntimePath() . '/' . $fileName; // 生成地址
    imagepng($image_1, $savePath); // 保存本地
    return $savePath;
}

$savePath = GdHelper::compose('底图', '插入图', '距左距离', '距上距离', '压缩比例');
$file = new \CURLFile($savePath, 'image/png', $savePath); // 获取图片文件

$params = [
        'access_token' => 'access_token',
        'type' => 'image',
        'media' => $file
];

$curl = new Curl();
$this->startTime = Dh::microtimeFloat(); //Request Begin
$response = $curl
    ->setHeaders([
        "content-type" => "multipart/form-data"
    ])
    ->setRawPostData($params)
    ->setOptions([
        CURLOPT_TIMEOUT => 5
    ];)
    ->post('https://api.weixin.qq.com/cgi-bin/media/upload');  // 上传微信
$this->afterRequest($curl);
$media_id = $response['media_id']; // 获取素材id