I don't think there are any html output sent out before the header() in the
login.php, so the header() should redirect to other page.(of course, the
login name and password are right.) But the IE shows error as below:
Warning: Cannot add header information - headers already sent by (output
started at c:\program files\apache group\apache\htdocs\web\lib.inc:18) in
c:\program files\apache group\apache\htdocs\web\login.php on line 18
The other question is can I put the session_start() after the line where the
login is ok; But if I do so, error showed:
Warning: Cannot send session cache limiter - headers already sent (output
started at c:\program files\apache group\apache\htdocs\web\lib.inc:18) in c:\program files\apache
group\apache\htdocs\web\6.php on line 16
In brief, what I need is redirection by header() and the generating of a
session when after the login is ok.
Thanks
Mike
(The scripts below are named as login.php which process the login form in
the login.htm. )
login.php
<?
session_start();
if($submit!=""){
if($login_name!=""&&$login_password!=""){
$link=mysql_connect("localhost","","");
$link=mysql_select_db("db");
$query="select password, user_id from users where user_name='$login_name'";
$res=mysql_query($query);
$num=mysql_num_rows($res);
if($num==0)
echo "The login name or password is not right!<br>";
if($num==1){
$arr=mysql_fetch_array($res);
if(!strcmp($arr['password'], $login_password)){
/ ??? can I put the session_start(); here? For from here the login is
ok, and the session is actually needed./
$user_id=$arr['user_id'];
session_register("user_id");
header("location: page2.php"); / Turn to page2.php automatically,
but error showed here while running /
exit();
}else
echo "The login name or password is not right!<br>";
}
}
}
?>
