thinkphp Model Connection database query Ajax

1. Connect to the database

In the template configuration file, write

2. Create model models for the Home and Admin to work together

3. Ways to instantiate a model

The first type:

.

Second type: M () method

Third type: D () method

The difference between the M () method and the D () method:

after tp3.2 ,m() and D () are the same, in the Previous version of 3.2 m () similar to the new Model (), D (' goods) is similar to the new Goodsmodel (), both the M method and the D method are used to instantiate a model class, the M method is used to instantiate an underlying model class efficiently, and the D method is used to instantiate a user-defined model class.

M () method for simple curd operation of data tables without complex business logic

But to use the business logic inside the model class, use the D () method

Extension

Data processing routine is to delete and change curd

Add: C create corresponds to thinkphp is $n->add ()

Delete: D Delete corresponds to thinkphp is $n->delete ()

Change: U update corresponds to thinkphp is $n->save ()

Check: R read corresponds to thinkphp is $n->select ()

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thinkphp Model Connection database query Ajax