After the string is intercepted by substr, it is blank after ajax is passed to the foreground.

After the string is intercepted by substr, the string is truncated by substr after ajax is passed to the foreground. after ajax is passed to the foreground, the string is blank. only English-only characters can be displayed, and Japanese characters can be blank, which of the following is the reason.

Reply to discussion (solution)

Json return? Chinese must be UTF-8 encoded for json output

What if I don't intercept?

?? UTF8?

In what format? Is the code correct?

Please ensure that the file encoding format is UTF8 without BOM. the default php encoding is UTF-8, and the mysql encoding is also utf-8. garbled characters will stay away from you!

Paste the code first.

Try transcoding due to encoding problems.

Encoding problems: use UTF-8