Where are the public function files in the Yii framework located?

We take the yii2-advanced version as an example:

##The above picture shows the basic directory structure of the yii2-advanced version, and. The /common directory is a public resource directory, and we can place the defined public methods in this directory.

In this directory, we can create a file at will, such as the "helps" directory. Considering that public methods may be divided into functional categories, we create a unified directory for management.

Two tool classes are created here.

(Recommended tutorial:

yii framework)

YII2 adopts PHP’s new feature namespace

Establishing public methods

<?php
namespace common\helps;
/*
 * 自定义全局公共方法
 */
class tools{
  public static function hello(){
    echo &#39;hello world!&#39;;
  }
}
?>

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