Tinkphp curd operations

Adding, deleting, modifying, and querying curd. outline of this lesson: 1. Introduction to CURD of ThinkPHP3 II. reading data from ThinkPHP3 (emphasis) Read $ mnewModel (& amp; #39...

Curd adds, deletes, modifies, and queries.

Outline of this lesson:

1. Introduction to CURD of ThinkPHP 3 (learn more)

II. ThinkPHP 3 reading data (important)

Read Data

$ M = new Model ('user ');

$ M = M ('user ');

Select

$ M-> select (); // Obtain all data and return it as an array

Find

$ M-> find ($ id); // Obtain a single data record

GetField (field name) // Obtain a specific field value

$ Arr = $ m-> where ('Id = 2')-> getField ('Username ');

III. ThinkPHP 3 create data (important)

Create

$ M = new Model ('user ');

$ M = M ('user ');

$ M-> Field name = value

$ M-> add ();

The returned value is the new ID number.

IV. ThinkPHP 3 delete data (important)

$ M = M ('user ');

$ M-> delete (2); // delete data with id 2

$ M-> where ('Id = 2')-> delete (); // the data with the id of 2 is also deleted.

The returned value is the number of affected rows.

5. ThinkPHP 3 update data (important)

$ M = M ('user ');

$ Data ['id'] = 1;

$ Data ['username'] = 'ztz2 ';

$ M-> save ($ data );

The returned value is the number of affected rows.