How to implement a daily vote for each ip address in php _ PHP Tutorial

Php implements a daily vote for each ip address. The following is the implementation code :? Php *** PHP + MySQL ** CREATETABLEIFNOTEXISTS 'IP _ poll '(* 'IP' varchar (15) NOTNULL, * 'date' datetimeNOTNULL *) enginemyisamdefacharcharset the following code is implemented:

3. /**
4. * PHP + MySQL
5. * Create table if not exists 'IP _ poll '(
6. * 'IP' varchar (15) not null,
7. * 'Date' datetime NOT NULL
8. *) ENGINE = MyISAM default charset = latin1;
9. *
10. */
12. Function getIP (){
13. $ Ip = "";
14. If (getenv ("HTTP_CLIENT_IP") $ ip = getenv ("HTTP_CLIENT_IP ");
15. Else if (getenv ("HTTP_X_FORWARDED_FOR") $ ip = getenv ("HTTP_X_FORWARDED_FOR ");
16. Else if (getenv ("REMOTE_ADDR") $ ip = getenv ("REMOTE_ADDR ");
17. Else $ ip = "";
18. Return $ ip;
19. }
21. Function checkVote ()
22. {
23. $ Ip = getIP ();
24. $ SQL = "select count (*) from ip_poll where ip = '". $ ip. "'and SUBSTR (date,) = '". date ("Y-m-d "). "'";
25. If ($ res = mysql_query ($ SQL ))
26. {
27. $ Row = mysql_num_rows ($ res );
28. If ($ row = 0)
29. {
30. $ Sqloud = "insert into ip_poll values ('". $ ip. "', now ());";
31. If (mysql_query ($ sqlIns ))
32. Return true;
33. Else
34. Return false;
35. } Else {
36. Return false;
37. }
38. } Else {
39. Return false;
40. }
41. }
43. ?>

Why :? Php/*** PHP + MySQL * create table if not exists 'IP _ poll '(* 'IP' varchar (15) not null, * 'date' datetime not null *) ENGINE = MyISAM default charset =...