How does the PHP interface return values for C # program calls be implemented in JSON format? Is it return or echo?

How does the PHP interface return values for C # program calls be implemented in JSON format? Is it return or echo?
Solving!!! How does the PHP interface return values for C # program calls be implemented in JSON format? is return or Echo returned with return?
Does echo help?
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Of course it's echo.
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Return can only be used inside PHP
External, you have to explain to others, you understand the output, with Echo
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Echo, of course, if it's JSON, it's better to add header ID.

 
 $ret = Array (
    ' Name ' = ' Fdipzone '
);
Header (' Content-type:application/json;charset=utf8 ');
echo Json_encode ($ret);
?>

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