How to use try_catch in yii2-wx

This article mainly introduces how to use try_catch in yii2-wx. It has certain reference value. Now I share it with you. Friends in need can refer to it.

As for why you should use try.. I don’t want to say more about the .catch... structure. This post will talk about how to use it in yii2-wx.

In other words, how many Exceptions do we need to pay attention to in yii2-wx? As we all know, yii2-wx is a communication library. Basically, every method has the operation of initiating a request with the WeChat server. To simulate the http client, we use the official extension of yii, yii2-httpclient.

So when we use yii2-wx, the first step to catch is the client exception, the following code

try {
    $qrcodeFile = $qrcode->strTemp(300,$code);
}catch(\yii\httpclient\Exception $e){
    // todo
}

This is where we have to catch the yiihttpclientException exception in communication.

Next let’s talk about the deconstruction of yii2-wx. As a single-entry extension, the Application class is very important, and this class also has exceptions thrown, such as when you use the driver to drive an interface helper object. When, the name of the interface is incorrect, this throws the Exception built in yii2-wx, so the correct way to use the driver is as follows

try {
    $app = new Application(['conf'=>$conf['mp']]);    
    $qrcode = $app->driver("mp.qrcode");
}catch(\abei2017\wx\core\Exception $e){
    // todo
}

The above mentioned the overall framework, and then the specific method, for example, when we use When $qrcode->strTemp(300,$code), there is no problem with communication, but there is a problem with obtaining the QR code result. At this time, these assistant methods will also throw an abei2017wxcoreException exception, which can be found in $e->getMessage Get the information in ().

Finally, let’s summarize the complete yii2-wx code writing structure.

try {
    $app = new Application(['conf'=>$conf['mp']]);
    $qrcode = $app->driver("mp.qrcode");
    $code = Yii::$app->security->generateRandomString();
    $qrcodeFile = $qrcode->strTemp(300,$code);
    
}catch(\abei2017\wx\core\Exception $e){
    // todo
}catch(\yii\httpclient\Exception $e){
    // todo
}

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