Detailed introduction to the m method in thinkphp

thinkphp is an excellent PHP development framework that can greatly improve the efficiency of web application development. During use, we often use the m method in thinkphp. What is it? This article will introduce you to the m method in thinkphp in detail.

The m method in thinkphp is the abbreviation of Model method. Model is the implementation of data in an application. It is usually used to operate the database and persist data into the database. In the thinkphp framework, the Model class provides methods for operating the database, which can quickly and easily complete operations such as additions, deletions, modifications, and searches.

Using thinkphp's m method can easily operate the Model class and read and write the database. The basic syntax of the m method is:

$model = M('table');

Among them, 'table' is the name of the table in the database, which can be a string or a variable.

The M method has multiple parameters. The first parameter is the database table name, and the following parameters are the database configuration information, including the database address, user name, password, etc. If the following parameters are not set, the project configuration file will be automatically loaded.

m method can not only instantiate the Model class, but also instantiate other non-Model classes. After the m method instantiates the class, you can perform corresponding operations on the class, and you can use the methods and attributes defined by the Model class.

The following is a sample code:

$user = M('user');
$user->where('id=1')->find();

The above code creates a Model class instance named $user, and uses the where() method and find() method to query the ID in the database table The record is 1, and then the query results are stored in the $user variable.

In addition to querying, the m method can also add, modify and delete data. The following is a sample code for adding data:

$user = M('user');
$user->username = 'test';
$user->password = md5('123456');
$user->add();

The above code creates a Model class instance named $user, and uses the add() method to add a record to the database table, including username and password. Two fields, the password is encrypted through the md5 function.

In addition to the common operations in the above examples, the Model class also provides a variety of methods, such as join(), order(), limit(), etc., which can help us perform database operations more flexibly.

To summarize, the m method in thinkphp is a method to quickly operate the database. It is based on Model and provides a variety of operations such as database addition, deletion, modification, and query, helping us quickly complete related tasks during the development process. operation, improving development efficiency.

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