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This article mainly introduces the relevant knowledge of m-method return value instance analysis in thinkphp, the content is detailed and easy to understand, the operation is simple and fast, and it has a certain reference value. I believe you will gain something after reading this thinkphp m-method return value instance analysis article. Let's take a look.

In thinkphp, the return value of the m method is a Model object; the m method can be understood as an abbreviation for "$m=new Model (" user ")", called in the format "M ('[base model name:] model name', 'data table prefix', 'database connection information')" to instantiate a base model class.

This article operating environment: Windows10 system, ThinkPHP5 version, Dell G3 computer.

What is the return value of m method in thinkphp

The M method can be thought of as an abbreviation for $m=new Model ("user"), that is, M () returns a Model object

The M method is used to instantiate a basic model class

The calling format of the M method:

M ('[base model name:] model name', 'data table prefix', 'database connection information')

What are the specific uses of the M method:

1. Instantiate basic model (Model) class

When no model is defined, we can instantiate a model class to operate using the following method:

/ / instantiate the User model $User = M ('User'); / / perform other data operations $User- > select ()

This method is the simplest and most efficient because there is no need to define any model classes, so cross-project calls are supported. The disadvantage is also that there is no custom model class, so the relevant business logic can not be written, only basic CURD operations can be completed.

$User = M ('User')

In fact, it is equivalent to:

$User = new Model ('User')

Indicates that the think_ user table is manipulated. The M method has the same singleton function as the D method, and multiple calls are not repeatedly instantiated. The model name parameter of the M method is automatically converted to lowercase when converted to a data table, which means that ThinkPHP's data table naming convention is in all lowercase format.

2. Instantiate other common model classes

The first way to instantiate is that there is no definition of a model class, so it is difficult to encapsulate some additional logical methods, but in most cases, you may just need to extend some general logic, so you can try the following approach.

$User = M ('CommonModel:User')

The change of usage is actually equivalent to:

$User = new CommonModel ('User')

Because the model classes of the system can be loaded automatically, we do not need to manually import the class library before instantiating. The model class CommonModel must inherit Model. We can define some general logic methods in the CommonModel class, without defining specific model classes for each data table, if your project already has more than 100 data tables, and in most cases are some basic CURD operations, but individual models have some complex business logic to encapsulate, then the combination of the first way and the second way is a good choice.

This is the end of the article on "instance Analysis of m-method return value in thinkphp". Thank you for reading! I believe you all have a certain understanding of the knowledge of "instance analysis of m-method return value in thinkphp". If you want to learn more, you are welcome to follow the industry information channel.

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