I cannot find the problem.-php Tutorial

I cannot find out the problem. $ SQL _insert = "insert into tb_user (usernc, turename, pwd, email, sex, tel, qq, address, logintimes, regtime, lastlogintime, ip, yb, usertype, question, answer, truepwd, photo, score) values ('$ _ POST [usernc]', '$ _ POST [truename]', '". md5 ($ psw ). "',' $ _ POST [email] ',' $ _ POST [select] ',' $ _ POST [tel] ',' $ _ POST [qq] ', '$ _ POST [address]', '0 ','". date ('Y-m-d H: I: s '). "','". date ('Y-m-d H: I: s '). "','". $ _ SERVER ['remote _ ADDR ']. "',' $ _ POST [yb] ', '0',' $ _ POST [question] ',' $ _ POST [answer] ', '$ _ POST [truepwd]', '$ _ POST [photo];', '30 ')";
$ Res_insert = mysql_query ($ SQL _insert );
// $ Num_insert = mysql_num_rows ($ res_insert );
If ($ res_insert)
{
Echo "script" alert ('registration successful! '); History. go (-1); script ";
}
Else
{
Echo "script alert ('the system is busy, please wait !!! '); History. go (-1); script ";
}

Reply to discussion (solution)

After the information is filled out, registration can only jump to the system busy. I think there is a problem with my SQL statement but it cannot be found.

{
Echo "script alert ('the system is busy, please wait !!! '); History. go (-1); script ";
}
Change
{
$ Msg = mysql_error ();
Echo "script" alert ('$ msg'); history. go (-1); script ";
}
See what is in the pop-up box

Blank

$ SQL _insert = "insert into tb_user (usernc, turename, pwd, email, sex, tel, qq, address, logintimes, regtime, lastlogintime, ip, yb, usertype, question, answer, truepwd, photo, score) values ('$ _ POST [usernc]', '$ _ POST [truename]', '". md5 ($ psw ). "',' $ _ POST [email] ',' $ _ POST [select] ',' $ _ POST [tel] ',' $ _ POST [qq] ', '$ _ POST [address]', '0 ','". date ('Y-m-d H: I: s '). "','". date ('Y-m-d H: I: s '). "','". $ _ SERVER ['remote _ ADDR ']. "',' $ _ POST [yb] ', '0',' $ _ POST [question] ',' $ _ POST [answer] ', '$ _ POST [truepwd]', '$ _ POST [photo];', '30 ')";
In red ???

No.

If the SQL command is incorrect, mysql will prompt you
What can I do if you don't know?

$ Msg = mysql_error ();
Echo "script" alert ('$ msg'); history. go (-1); script ";
The information cannot be displayed after this game is added.

If it is displayed as blank, it indicates that your program has a syntax error and the error display function is not enabled.
You only gave the program fragment and you cannot judge the problem.

Require_once 'Conn. php ';
If (isset ($ _ POST ["submit"]) & $ _ POST ["submit"] = "register ")
{

$ User = $ _ POST ["usernc"];
$ Trueuser = $ _ POST ["truename"];
$ Psw = $ _ POST ["pwd"];
$ Psw_truepwd =$ _ POST ["truepwd"];
$ Email = $ _ POST ["email"];
$ Sex = $ _ POST ["select"];
$ Tel = $ _ POST ["tel"];
$ Qq =$ _ POST ["qq"];
$ Address = $ _ POST ["address"];
$ Yb = $ _ POST ["yb"];
$ Question = $ _ POST ["question"];
$ Answer = $ _ POST ["answer"];
$ Photo = $ _ POST ["photo"];
If ($ user = "" | $ trueuser = "" | $ psw = "" | $ psw_truepwd = "" | $ email = "" | $ sex = "" | $ tel = "" | $ qq = "" | $ address = "" | $ yb = "" | $ question = "" | $ photo = "" | $ answer = "")
{
Echo "script" alert ('check the information integrity! '); History. go (-1); script ";
}
Else
{
If ($ psw = $ psw_truepwd)
{
$ SQL = "select usernc from tb_user where usernc = '$ _ POST [usernc]'"; // SQL statement
$ Result = mysql_query ($ SQL); // execute an SQL statement
$ Num = mysql_num_rows ($ result); // count the number of rows affected by execution results
If ($ num) // if the user already exists
{
Echo "script" alert ('user name already exists '); history. go (-1); script ";
}
Else // the name of the currently registered user does not exist
{

$ SQL _insert = "insert into tb_user (usernc, turename, pwd, email, sex, tel, qq, address, logintimes, regtime, lastlogintime, ip, yb, usertype, question, answer, truepwd, photo, score) values ('$ _ POST [usernc]', '$ _ POST [truename]', '". md5 ($ psw ). "',' $ _ POST [email] ',' $ _ POST [select] ',' $ _ POST [tel] ',' $ _ POST [qq] ', '$ _ POST [address]', '0 ','". date ('Y-m-d H: I: s '). "','". date ('Y-m-d H: I: s '). "','". $ _ SERVER ['remote _ ADDR ']. "',' $ _ POST [yb] ', '0',' $ _ POST [question] ',' $ _ POST [answer] ', '$ _ POST [truepwd]', '$ _ POST [photo]', '30 ')";
$ Res_insert = mysql_query ($ SQL _insert );
// $ Num_insert = mysql_num_rows ($ res_insert );
If ($ res_insert)
{
Echo "script" alert ('registration successful! '); History. go (-1); script ";
}
Else
{

$ Msg = mysql_error ();
Echo "script" alert ('$ msg'); history. go (-1); script ";
// Echo "script" alert ('the system is busy. please wait! '); History. go (-1); script ";
}
}
}
Else
{
Echo "script" alert ('inconsistent passwords! '); History. go (-1); script ";
}
}
}
Else
{
Echo "script alert ('submission failed! '); History. go (-1); script ";
}
?>
This is a problem when all the code is actually capable of redirection.

Put $ res_insert = mysql_query ($ SQL _insert );
Change to $ res_insert = mysql_query ($ SQL _insert) or die (mysql_error ());

Unknown column 'turename' in 'Field list'

Okay, I typed it wrong.

Ah, it's so sloppy, but I learned how to find the SQL problem. thank you!

The turename column does not exist.