What to do if thinkphp5 ajax reports 500 error

php Ajax500 error solution: first open the error script file; then modify the error code to "echo json_encode($arr)"; finally save the modified file.

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Scenario: Several sites from Alibaba Cloud Migrate to Tencent Cloud, and then TP5 project ajax request reports 500 error. The data is returned successfully, but the http status code is 500. If you don’t go to success, you keep going to error

## as shown below:

## Reason analysis:

## As shown above: Do not use exit() method, do not use json(), Use echo json_encode($arr)

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