With the development of PHP technology, more and more developers are beginning to pay attention to the PHP framework. ThinkPHP 5 is a comprehensive PHP framework that provides powerful functions and reduces the work of program developers during the development process. quantity. The summation method is an operation that many developers must do. In this article, we will learn the process of adding sum method in ThinkPHP 5.

Step One: Create Model File

In ThinkPHP 5, we need to create the Model file ourselves to complete data operations. We need to create a new file named Sum.php in the application directory. The code is as follows:

namespace?app\index\model;
use?think\Model;

class?Sum?extends?Model
{
????//?求和方法
????public?function?sum()
????{
????????$result?=?$this->sum('field');
????????return?$result;
????}
}

In this code, we create a Model file named Sum, which contains a sum method. . This method uses the sum function to perform a sum operation on the specified field field and returns the sum result.

Step 2: Configure the database connection

In ThinkPHP 5, we need to configure the database connection in the configuration file. We need to configure it in the database.php file in the application directory. The code is as follows:

return?[
????//?數(shù)據(jù)庫(kù)類(lèi)型
????'type'????????????=>?'mysql',
????//?服務(wù)器地址
????'hostname'????????=>?'localhost',
????//?數(shù)據(jù)庫(kù)名
????'database'????????=>?'test',
????//?用戶名
????'username'????????=>?'root',
????//?密碼
????'password'????????=>?'',
????//?端口
????'hostport'????????=>?'',
????//?連接dsn
????'dsn'?????????????=>?'',
????//?數(shù)據(jù)庫(kù)連接參數(shù)
????'params'??????????=>?[],
????//?數(shù)據(jù)庫(kù)編碼默認(rèn)采用utf8
????'charset'?????????=>?'utf8',
????//?數(shù)據(jù)庫(kù)表前綴
????'prefix'??????????=>?'tp_',
];

In this code, we configure the connection information of the database, including database type, server address, database name, Username and password, etc. Make sure this configuration is consistent with your database connection information.

Step 3: Use the Model file to operate

After configuring the Model file and database connection, we can use the Model file to operate the database. The code is as follows:

use?app\index\model\Sum;

$sum?=?new?Sum();
$result?=?$sum->sum();
echo?$result;

In this code, we use the sum method in the Sum Model and output the summation result. In this way, we successfully summed the specified fields in ThinkPHP 5.

Conclusion

In this article, we discussed how to implement sum operation in ThinkPHP 5. First, we created a Sum Model file and wrote the sum method in it. Next, we configured the database connection information in the configuration file and used the Model file to operate the database. I recommend you try it out for yourself to better understand the sum operation in ThinkPHP 5.

The above is the detailed content of The process of adding summation method in thinkphp5. For more information, please follow other related articles on the PHP Chinese website!