the php image verification code is used in the background, and the front end carries the cookie verification code through fetch. There are multiple projects in a domain name that require picture CAPTCHA to verify login. On Android phones, every project can be verified. But it can"t be verified on the iPhone. It"s always a CAPTCHA error. Sessionid seems to be multiple requests, and check when the request, the source is not clear, how to solve this problem?
when authentication fails,