How to output detailed error information in thinkphp5

1. Set debugging mode

Using debugging mode, ThinkPHP5 can output detailed error information on the page. In the development environment, we can turn on debugging mode to facilitate our development. However, in a production environment, we need to turn off debug mode to avoid leaking sensitive information.

The method to turn on the debug mode is as follows:

1. Open the app.php file in the config directory, find the debug option and set it to true.

2. Open the index.php file in the public directory, find the APP_DEBUG option, and set it to true.

Of course, in a production environment, we need to change these options to false to avoid leaking sensitive information.

2. Use exception handling

In addition to setting the debugging mode, we can also use exception handling to output detailed error information.

1. Exception

In ThinkPHP5, exceptions are a crucial concept. Any error message is provided by outputting an exception. Therefore, we need to learn how to use exceptions to output detailed error information.

In ThinkPHP5, exceptions are divided into three types:

1) \think\Exception: ordinary exception class, generally used for business logic restrictions, inheriting the Exception class that comes with PHP.

2) \think\exception\HttpException: HTTP exception class, used for exceptions related to HTTP requests.

3) \think\exception\ValidateException: Verification exception class, used to throw when the validator fails to verify.

2. Throw exception

When an error occurs in the program, we can throw an exception to stop the program from running and output error information. The following is a simple code example:

if(!$result) {
    throw new \Exception('错误信息');
}

This code will throw an exception and output an error message when $result is false.

3. Catch exceptions

Using try...catch statement block to catch exceptions and print error information is a commonly used method in code. The following is a simple code example:

try {
    // 可能会抛出异常的代码
} catch (\Exception $e) {
    echo $e->getMessage();
}

This code will execute the code in the try statement block. If an exception occurs during the execution, it will be captured by the catch statement block and an error message will be output.

3. Use logs to record error information

In addition to the above two methods, we can also use logs to record error information. We will not introduce the logging system of ThinkPHP5 in detail, but simply explain how to use logs to record error information.

1. Configuring log

In the app.php file in the config directory, we can find the log configuration item and set the log driver and log Storage path and other related configurations.

2. Logging

In the code, we can use the Log class to record logs. The following is a simple code example:

use think\facade\Log;

try {
    // 可能会抛出异常的代码
} catch (\Exception $e) {
    Log::error('错误信息：'.$e->getMessage());
}

This code will execute the code in the try statement block. If an exception occurs during execution, it will be captured by the catch statement block and use the Log class to record error information.

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