Thinkphp3。 Verification of verification code always shows that the verification code has been entered incorrectly.

Honey, there is something wrong with your check_verify. You always return json data.

$ this-& gt； ajaxReturn($res，' JSON ')；

This is the return method of the corresponding ajax request, so when you call it,

If (! Check_verify($verify) here should always hold, so $ this->; mistake

You put $ this-& gt；; AjaxReturn($res,' json') is changed to return $ res; Give it a try! ~~