How to solve ThinkPHP5 HTTP status code 500

When a ThinkPHP5 project is deployed, the environment is a Linux server. The front-end Vue project accesses the interface through Axios and always follows the catch logic. Requesting the interface directly in the browser can return normal data, but the status code of the request viewed through the Chrome browser is red 500. Preliminary guess is that the unsuccessful front-end request is related to ThinkPHP5 HTTP status code 500. Let’s explain in detail how to solve ThinkPHP5 HTTP status code 500. (RecommendedPHP video tutorial)

When it is discovered that the ThinkPHP5 HTTP status code is 500 marked in red, the first reaction is an internal error in the server, that is, there is a problem with the syntax of your own code. First check whether there is any problem with the logic of this interface. After careful investigation, it was found that there was no problem. The situation was similar when accessing other interfaces. The page content returned normally and the status code was always 500.

Then I speculated whether it was a problem with the ThinkPHP5 framework, so I wrote a simple return hello. world. Still, the page content returns to normal and the status code is always 500. At this point I carefully reviewed the question and my previous assumptions. I have been thinking for a long time, is it caused by the read and write permissions of the runtime folder under the Linux system? At this time, with the mentality of giving it a try, using chmod in the command line to set the permissions of the runtime folder solved the problem.

Looking back, there are a lot of uncertainties to solve by speculation, and it requires a lot of practical project experience. Suggestions for some programmers who are new to the industry:

1. Open the project debugging mode and directly display the problem on the page. This can greatly improve our efficiency in solving problems.

2. Check the server log. This error is in apache error_log: PHP Fatal error: Uncaught exception ‘think\\exception\\ErrorException’ with message ‘mkdir(): Permission denied’.

3. Go to official documents, forums and communities to find answers. Many problems have been encountered by others and shared.

4. Do more line-breaking debugging to speculate and verify. Regardless of whether it can solve the current problem or not, it is a consolidation of knowledge.

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