Can I use $fp=fsockopen(\"admin:123456@www.jackson.com\", 80, &$errno, &$errdesc); for connect to www.jackson.com with register by username:admin, password:123456
No harm in trying 🙂, though you need forward slashes, not backslashes, and you also need to mention the connection protocol (http:// I'd guess from your socket number).
