Multiple configuration files and environment deployment methods for PHP development in WeChat mini programs

With the continuous rise of WeChat mini programs, more and more developers choose to use PHP to develop mini programs. When developing WeChat applet, we usually need to configure many parameters, such as interface address, database connection, cache, etc. Different development environments and different deployment solutions will also cause us to use different configuration files. Therefore, this article will introduce the method of deploying multiple configuration files and environments when developing WeChat mini programs in PHP to help developers better develop and deploy.

1. Why multiple configuration files are needed

When developing WeChat mini programs, we often need to use some sensitive information, such as database connection information, API interface addresses, etc. This information is generally stored in configuration files and read in code. However, different deployment environments will have different needs. For example, the development environment requires debugging mode, while the production environment needs to enable caching and code compression, etc. Therefore, we need different configuration files to adapt to different needs.

If there is only one configuration file, then we need to manually modify the configuration file when switching deployment environments, which can easily lead to human errors and is more cumbersome. Therefore, we need to use multiple configuration files to easily switch configurations in different environments.

2. Naming rules for configuration files

We use different naming rules to distinguish different environments. Common ones are:

• config_dev.php: development environment Configuration file, the naming rule is config_environment name.php.
• config_test.php: Configuration file for the test environment.
• config_pro.php: Configuration file for the production environment.

The above naming rules are for reference only, you can name them according to your actual needs.

3. Contents of the configuration file

In the configuration file, we need to configure many parameters, including but not limited to:

• Database connection information: database Host, user name, password, library name, etc.
• API interface address: including interface domain name, port number, path, protocol, etc.
• Cache: cache type, cache time, etc.
• WeChat applet information: AppID, AppSecret, etc.

According to actual needs, you can add other parameters to the configuration file, such as file upload path, log configuration, etc.

4. Switching different configuration files

In the case of multiple configuration files, how to let the code know which configuration file to use? We can determine the current deployment environment in the code and then load the corresponding configuration file.

For example, in config.php, we can write like this:

if ($env == 'dev') {
    require_once('config_dev.php');
} else if ($env == 'test') {
    require_once('config_test.php');
} else {
    require_once('config_pro.php');
}

where $env represents the name of the current deployment environment, which can be obtained by reading environment variables or configuration files.

5. Environment deployment method

In the case of multiple configuration files, we need to deploy different configuration files to different environments. Generally speaking, we have three types of environments: development environment, test environment and production environment.

1. Development environment

The development environment is where we develop and test. It is generally deployed on a local or local area network server. In the development environment, we can use the following operations to deploy:

1) Specify the parameters of the development environment in the configuration file.

2) Build a development environment locally, including installing the PHP environment, building the MySQL database and server environment, etc.

3) Upload the code to the development environment and run the relevant instructions.

2. Test environment

The test environment is an environment used to test code and is generally used to simulate the production environment. In the test environment, we can use the following operations to deploy:

1) Specify the parameters of the test environment in the configuration file.

2) Upload the code to the test server and run the relevant instructions.

3) The test server should be similar to the production server, such as the operating system, network environment, etc. should be the same as the production environment.

3. Production environment

The production environment is the environment where we formally provide services to users and is deployed on a public network server. In the production environment, we can use the following operations to deploy:

1) Specify the parameters of the production environment in the configuration file.

2) Upload the code to the public server and run the relevant instructions to start the service.

3) In the production environment, you need to pay attention to data security, such as preventing SQL injection, XSS attacks, etc.

6. Summary

When developing WeChat applets, using multiple configuration files and environment deployment methods can enable us to deploy applications more flexibly and better adapt to different environmental needs. This article introduces the naming rules and content of configuration files, as well as how to switch different configuration files and deploy different environments. I hope this article can help everyone develop and deploy WeChat applets in PHP more efficiently.

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