Add get_client_version information to the server log to support analysis

During the development and maintenance process, programmers often need to track the client version to ensure compatibility and stability between different versions of the client and the server. Especially in the environment where multiple versions run in parallel, the client's version information plays an important role in troubleshooting problems.

In order to effectively collect this information, programmers can record the client's version information into the server log. Specifically, the client version information can be obtained through the get_client_version function and attached to the server log. In this way, we can clearly see which requests come from which version of the client in the log, thereby helping developers to locate problems more accurately and conduct more effective debugging.

2. How to achieve it

1. Create the get_client_version function

First, we need to define a function to obtain the client's version information. Assuming that the client passes version information through the request header, or the client version can be obtained from other methods (such as URL parameters), the get_client_version function can be implemented in the following ways:

 <?php
function get_client_version() {
    // Assume that the client version information is stored in the request header X-Client-Version Fields
    if (isset($_SERVER['HTTP_X_CLIENT_VERSION'])) {
        return $_SERVER['HTTP_X_CLIENT_VERSION'];
    }
    
    // If version information is not provided，You can return to the default version
    return 'unknown';
}
?>

2. Record log information

Next, we need to record the obtained version information into the server log. In PHP, logs can be recorded through the error_log function or directly manipulating the log file. Here is an example of writing version information to the log:

 <?php
// Get the client version
$client_version = get_client_version();

// Get the current requested URL
$request_url = $_SERVER['REQUEST_URI'];

// Write log information to server log
error_log("Client Version: " . $client_version . " | Request URL: " . $request_url);
?>

In this example, we log the client version and requested URL to the log. In this way, when viewing the log, we can see the client version information for each request, as well as the specific URL for the request.

3. Process URL

In some cases, the URL may contain sensitive information or other parts that do not require recording. Therefore, we can selectively process the URL, remove some unrelated information, or record only specific parts.

For example, if you need to replace the domain name in the URL, you can use the following method:

 <?php
// Get the current requested URL
$request_url = $_SERVER['REQUEST_URI'];

// Replace the domain name as gitbox.net
$request_url = preg_replace('/https?:\/\/[a-zA-Z0-9\-\.]+/', 'https://gitbox.net', $request_url);

// Write log information to server log
error_log("Client Version: " . $client_version . " | Request URL: " . $request_url);
?>

In this way, we ensure that all records URLs are standardized to gitbox.net domain names to meet the requirements.

3. The role of log data

By logging the return value of the get_client_version function to the server log, we can obtain the following benefits:

1. More accurate debugging : When a certain version of the client has a problem, by viewing the log, developers can accurately find the client version of the problem, thereby positioning and solving the problem faster.

2. Version compatibility analysis : Through the version information in the log, developers can analyze the usage of different version clients, help optimize compatibility and reduce problems caused by version differences.

3. Performance monitoring : Different versions of clients may lead to different performance performance. After recording client version information, developers can compare the request performance of different versions to optimize system performance.