php json_encode Chinese does not transcode

1. php json_encode Chinese does not transcode, and the following two conditions need to be met

2. json_encode() sample code

3. Save the above code and preview it in the browser

4. Fill in the second one for json_encode() Parameter: JSON_UNESCAPED_UNICODE, which can realize Chinese non-transcoding

5. Save the code again and view the encoded JSON format string in the browser. Chinese characters are displayed normally

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