Status codes and error handling methods for PHP development in WeChat mini programs

As one of the most popular social media platforms currently, WeChat has become one of the important channels for interactive communication between businesses and individuals. WeChat mini programs are more convenient for users to use and developers to innovate. In the development of small programs, PHP is an important back-end technology, but problems with status codes and error handling can easily occur during the development process. This article will introduce various status codes and error handling methods developed in PHP in WeChat mini programs.

1. Status Code in WeChat Mini Program

In WeChat Mini Program, HTTP Status Code (HTTP Status Code) is a status identifier returned by the back-end service to the front-end. A three-digit numerical code. Through the value of the HTTP status code, we can know whether the request was successful and the specific error information. Especially when doing interface joint debugging, it can save a lot of time and energy.

In the WeChat mini program, the common HTTP status codes are as follows:

1. 200: Request successful

In the WeChat mini program, The 200 status code indicates that the request was successfully processed and data was returned.

2. 400: Request parameter error

If the requested parameters are illegal or lack some necessary parameters, the backend will return a 400 status code, prompting the frontend to check it. Request parameters.

3. 401: Unauthorized access

If a valid authentication token is not provided in the request, the backend will return a 401 status code. In WeChat mini programs, this situation is usually related to the login status of the mini program.

4. 404: The requested resource does not exist

If the backend cannot find the requested resource, it will return a 404 status code, prompting the frontend to check whether the requested URL is correct.

5. 500: Internal server error

If an exception or failure occurs in the back-end program, a 500 status code will be returned. Usually, this situation requires the developer to modify the code or Find the error log.

2. Error handling methods in WeChat mini programs

In WeChat mini programs, there are a lot of status codes and error handling methods developed by PHP. If developers can master error handling well, they can greatly improve development efficiency and code quality. The following are some common error handling methods in small program development:

1. PHP Error Log

When an error occurs in a PHP program, you can use the PHP error log to record the error information. We can set the path, recording level and format of the error log by calling the ini_set() function through PHP configuration or code.

2. Debugging Tool

In the WeChat applet, the debugging tool is a very useful tool. Developers can use debugging tools to monitor PHP program errors in real time and troubleshoot them in a timely manner. They can also observe requested Header and Body information.

3. Exception handling

Exception handling (try-catch block) in PHP can also be used to capture exception information when the program is running. If an exception occurs in a PHP program, developers can use exception handling to record exception information and handle exceptions.

4. Assertion (assert)

Assertion (assert) is a powerful debugging tool that can also be used to handle errors in PHP. When the program encounters the assert() statement, if the condition does not hold, the program will throw an AssertionFailedException exception. Developers can use this exception to locate the error.

Summary

In most cases, the status codes and error handling methods developed by PHP in WeChat mini programs are skills that test developers must master. Whether studying or practicing, we should be familiar with status codes and error handling methods in WeChat applet development. In this way, we can avoid making some classic mistakes and improve development efficiency and code quality.

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