\ U6784 category Chinese character conversion

Conversion of \ u6784 type Chinese characters \ u6784 and how to transfer Chinese characters (convert to Chinese characters that can be understood by a person) through php and js, for example, $ string = '\ u6784 ', echo & nbsp; json_decode ('"\ u6784"'); // Structure, reference: ech \ u6784 conversion of Chinese characters
How to transfer Chinese characters such as \ u6784 through php and js (convert to a Chinese character that can be understood by a person), for example, $ string = '\ u6784'
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Echo json_decode ('"\ u6784"'); // Structure

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Reference:

Echo json_decode ('"\ u6784"'); // Structure

Are you sure this is feasible? The result returned by my test is null.
My practice is to construct a json string and decode

$ String = '\ u6784 ';
$ Json_str = '{"str": "'. $ string .'"}';
Var_dump (json_decode ($ json_str, 1 ));


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Do not doubt people's sincerity
The running result of your code:
'Str' => string ''(length = 3)

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Use json_decode to solve Unicode height