PHP Warning:json_encode (): Invalid UTF-8 sequence in argument in ....

Title error occurred, the emergency solution is as follows:

$vlaue needs to be converted with Json_encode (), which contains Chinese. All null after execution, so a title error occurs

So how do we solve this problem?

In the context of the integration of information on the Web and the practical solution to this problem:

Before Json_encode (), add the following sentence:

$var = mb_check_encoding ($var, ' UTF-8 ')? $var: mb_convert_encoding ($var, ' UTF-8 ', ' GBK ');

Try it if you don't believe it!

This article from "Lamp Small rookie" blog, declined reprint!

PHP Warning:json_encode (): Invalid UTF-8 sequence in argument in ....