Why is there no change in php js modification?

Problem Description

In the process of developing using PHP and JavaScript, sometimes you encounter situations where the code is modified but does not take effect. This problem can cause a lot of trouble for developers because it is difficult to locate the problem. In this article, we will discuss the possible causes and solutions to this problem.

Possible reasons

1. Caching problem

The browser has a caching mechanism. Without special settings, some files may be cached, so This will cause the modification to fail to take effect. After modifying the code, either clear the browser cache or use mechanisms such as random numbers or timestamps in the file names to ensure that they are not cached. You can check whether there is cache by checking the response header in the console for cache information.

2. File path error

If the path and file name of the file are modified, since the file path is related to the file name and the location of the file, it may result in the modification not being Take effect. If this happens, check that the file path matches the actual location.

3. Code Error

When modifying the code, syntax errors, logic errors and other problems may occur. These problems may cause the code to not execute properly. It is recommended to use development environment tools to quickly review your code and resolve issues. In addition to this, you can add log or debug statements to the file to aid debugging.

Solution

1. Clear the cache

Clearing the browser cache can ensure that the modified code can be loaded correctly. You can clear your browser cache manually, disable caching in the console, or add a new query string in your code. This will force the browser to reload the file.

2. Confirm the file path

After modifying the file path and file name, you can ensure that the modified location is correct by viewing the file directory and file name. When exporting files, also make sure that the file paths and names are correct in the output.

3. Use debugging tools

Using development environment tools, such as PHPStorm, etc., can help check errors and problems in the code. These tools can provide prompts for syntax errors or logic errors, and can automatically complete code to improve development efficiency. When troubleshooting code issues, you can also use log files or debugging statements for further debugging.

Conclusion

The inability to see changes in code modifications in time may have a lot of impact on developers, but usually these problems can be solved by checking the cache, path and code. If these methods do not work, it is recommended to review the log files or use debugging tools for further debugging. These problems can be easily avoided with careful code management.

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