How to perform addition, deletion, modification and query operations in the ThinkPHP framework

In modern web application development, adding, deleting, modifying and querying data is a very basic operation. As one of the most popular web development languages ​​at present, PHP has many frameworks that support addition, deletion, modification and query operations, among which ThinkPHP is one of the very excellent frameworks.

This article will introduce how to perform addition, deletion, modification and query operations in the ThinkPHP framework, and give corresponding sample code.

1. Add a record

In ThinkPHP, adding a new record can be completed through the following steps:

1. Build a new data object
2. Assign attributes , and persist it into the database

The following is a very simple example that demonstrates how to add a user record through the User data model class.

$user = new User;
$user->name = '张三';
$user->email = 'zhangsan@gmail.com';
$user->save();

In the above code, we first create a new User object $user. Then, we assign values ​​to the attributes name and email of the object. Finally, we save this object to the database.

2. Update records

Modifying a record is also a very simple operation in ThinkPHP. We can complete it according to the following steps:

1. Get the database record to be modified Model object
2. Modify the attribute value of the model object
3. Save the model object to the database

The following is a sample code for modifying user records:

$user = User::get(1);
$user->name = '李四';
$user->save();

In this example , we first use the get() method to obtain the User object of the user record to be modified. Then, we modify the name attribute of the object to '李思' and save the object to the database.

3. Query records

In ThinkPHP, querying database records is very simple. You can use the find() and select() methods provided by the Model class.

The find() method is used to query and return a single record. The following is a sample code for querying user records with email=‘zhangsan@gmail.com’:

$user = User::where('email', 'zhangsan@gmail.com')->find();

select() method is used to query and return a set of records, and its parameters are similar to the where() method. The following is a sample code to query all user records whose emails are suffixed with '@gmail.com':

$users = User::where('email', 'like', '%@gmail.com')->select();

4. Delete records

Deleting a record is also very simple. You can use Model The destroy() method of the class is completed. The following is a sample code to delete the user record with ID 1:

$user = User::destroy(1);

In this code, we directly call the destroy() method of the User model class to delete the user record with ID 1.

Summary

This article introduces the basic methods and sample code for adding, deleting, modifying and checking operations in the ThinkPHP framework. These operations are one of the most basic operations in web application development, and learning and mastering them is crucial to becoming an excellent web developer.

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