How to get the value of parameters in yii2 configuration file

I want to put the appid of the WeChat public account into a custom parameter in a configuration file, and then it can be called in any controller. If it is modified, the place where it is called will be modified.

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I want to put the appid of the WeChat public account into a custom parameter in a configuration file, and then it can be called in any controller. If it is modified, the place where it is called will be modified.

config/param.php

Yii:$app->params['key'] key is your parameter key name

First put the parameters into the params.php file in the config directory, as follows:

<code>return [
    'key' => 'value',
];</code>

Then, when quoting, use:

<code>\Yii::$app->params['key']</code>

Note that it is params, not param.