Yii source code interpretation-class automatic loading

To implement

Yii’s automatic class loading, it relies on PHP’s spl_autoload_register(). Register an own autoloading function (autoloader) and insert it into the front of the autoloading function stack to ensure that Yii’s autoloader will be loaded first. transfer.

require(__DIR__ . '/../../vendor/autoload.php');

require(__DIR__ . '/../../vendor/yiisoft/yii2/Yii.php');

First load the third-party autoloader, and then load Yii's autoloader.

Last load Yii's autoloader, which ensures that Yii is loaded first.

Yii.php can view the call of the autoloader code, which registers BaseYii::autoload() as an autoloader.

The classes.php called in it contains all core classes.

Reference

1. http://www.digpage.com/autoload.html

The above introduces Yii source code interpretation - automatic class loading, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.