Thinkphp entry 2 (46) and thinkphp entry 46

Thinkphp entry 2 (46) and thinkphp entry 46
[Empty Operation Processing]

See the following figure:

A user accesses an operation that does not exist. Solution: Define the _ empty () method for each controller to process the operation.

Solution 2: Define an empty operation

[Empty module processing]

We use a class, but this class is not included yet.

We can use the automatic loading mechanism to process _ autoload (). If this automatic loading mechanism does not find this class, an error is returned.

Request an empty module

Solution 1: Define an empty controller and module

Solution 2:

[Add a function library file to the application]

In the Common folder, it is the place where we put the library file.

[Module group] 1. Set the controller group

2. View templates need to be grouped

3. Configure variables to be grouped

4. Configure config. php

[Pre-operation and post-operation]

When the methods in the controller are called, some additional work can be done before or after the call, which is called pre-operation and post-operation.

When we request this URL: http: // URL/index. php/Admin/Goods/zhanshi, where the action occurs when the method exists, App. class. in the exec () method of php

There are many methods in a class that require both pre-and post-operations. How can this problem be solved?

Solution:

[Cross-module call]

Instantiate a non-existent class, which will be automatically loaded through the _ autoload () mechanism.

Where is the _ autoload () of the tp framework? In Think. class. php

Instantiate A controller object using the () method

A ('module controller') Example: A ('goods ')

A ('group/controller') for example: A ('home/ucenter ');

A ('Project: // group/controller') for example: A ('shop: // home/ucenter ');

The A () method contains nested calls to the import () method. This method helps us obtain the corresponding controller and introduces require. A () method directly new the instantiated object by the way

 

R ("Project: // group/controller/Operation") Method

It inherits the introduction, instantiation, and method calls of controllers.

R ('module Controller/operation') Example: A ('goods ')

R ('group/controller/operation') for example: A ('home/Ucenter/members ');

R ('Project: // group/controller/operation') for example: A ('shop: // home/Ucenter/members ');

 

Call the () method in the R () method.

Call the import () method in the () method.

A () method usage

R () method usage