Laravel document sorting 10. Request life cycle

Preface ：Laravel Document sorting , Only for record , Nothing else .

1、 User access laravel Framework of the project website , Web server , First, direct the request settings to /public/index.php file .

2、Index.php File loading composer Generated autoloader , obtain bootstrap/app.php The application instance generated in the file .

3、 Next , That's it app/Http/Kernel.php file , This document , Expanded
Illuminate\Foundation\Http\Kernel This document , Realization , Handle errors ahead of time , journal , Detect the application environment , And other tasks that should be completed in advance .

4、 Send back http The corresponding , End cycle .

explain ：http The core of the also defines a list of middleware , Such as session Reading and writing 、 verification CSRF token 、 Determine if the application is in maintenance mode , And others .

The most important core startup yes ： The service provider that loads the application .

This is probably , from config/app.php In the document $provider The primary key in the array , then , Put these components , To register , then ,boot Method , It will be called , Last , Which component does the project use , Direct distribution , That's all right. .

Personal comparative understanding of the life cycle ：
        take laravel The frame is compared to a special forces , request , It is equivalent to an order , After the order was given , Special forces have to get mission information , This is his conscious reaction , That is, automatically load , After understanding the task , He needs to get the gun 、 ammunition 、 Body armor 、 dagger 、 lighter 、 Food and other necessities , These are like loading components , After receiving it , He must check whether the gun is in good condition and usable , Is there enough ammunition , Whether the food is sufficient , Whether there are enough other things to bring , This one is similar to $provider, Component registration , Wait for everything to be ready , It is equivalent to that this part of the operation between request and response has been completed , That is, the component is registered , Next , Is to perform the task , That is, responding to a request , Assign to the corresponding route , It is equivalent to that special forces should go to the designated place to perform tasks , Kill the enemy , Now , The firearms of the middleware 、 The bullet 、 dagger , These components , Can be used to kill the enemy , amount to boot Method , The final response result , Is to kill the enemy , To complete the task , End cycle .