Chatting room php & mysql (5)

Page 5 namechangenick. php & lt ;? & Nbsp; include .. signupMySQL (the best combination with PHP ). php; echo & #36; userid; if (& #36; actionok) & #123; & #36; sqlselect * fromchat_user_listwhere the fifth page name = "changenick. php"


Include "../signup/MySQL (the best combination with PHP). php ";
// Echo $ userid;
If ($ action = "OK ")
{
$ SQL = "select * from chat_user_list where userid = '$ nick '";
$ Result = MySQL (the best combination with PHP) _ query ($ SQL) or die (the best combination of MySQL (and PHP) _ error ());
If (! $ Result) echo "this name has been occupied by another person. please enter it again ";
Else
{
$ SQL = "update chat_user_list set id = '$ nick', passwd = '$ passwd', sex =' $ sex' where userid = '$ userid '";
$ Result = MySQL (the best combination with PHP) _ query ($ SQL) or die (the best combination of MySQL (and PHP) _ error ());

$ SQL = "update chat_user set id = '$ nick', passwd = '$ passwd', sex =' $ sex' where userid = '$ userid '";
$ Result = MySQL (the best combination with PHP) _ query ($ SQL) or die (the best combination of MySQL (and PHP) _ error ());
}
If ($ result ){
Echo"