A brief analysis of thinkphp controller

This time I will give you a brief analysis of the thinkphp controller and what are the precautions for building a thinkphp controller. The following is a practical case, let's take a look.

1. Public operations and public controllers:

a. Create public operations through the construction method: initialize within the construction method

Introduce the initialization method of the controller class file:

The construction method or the initialization method of the base class solves the problem of the controller Problems with shared data in operations

If multiple controllers want to share some, you can create a public controller class: the Base file is a public controller class

Inherit public controller:

2. Pre-operation: An operation that must be performed before an operation is performed

a. All operations perform the same pre-operation.

Inherit the methods in the base class and define the scope of effect. Demo2 and demo3 above The method returns the same sitename as demo1

Access: At this time, the methods of accessing demo2 and demo3 show that they are all Chinese websites, because the pre-operation is performed before performing the operation. Method

b, pre-operation accepts parameters, the parameters should come from the url request, take the request variable as an example, use the acquisition of the request variable The statement replaces the original $site->sitename

here with $this->request to obtain the current request object. The base class request attribute corresponds to the request. Instance of the object:

Then call the param method and give the variable name name

Access:

c, before partial execution Setting operation situation: only defines that "Resolutely resist THAAD" will be output only when accessing demo2

Access:

d. Use the elimination method to set the pre-op:

access:

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