Says Warning…

Warning: Cannot modify header information – headers already sent by (output started at C:Program FilesxampphtdocsStaffLogin.php:6) in C:Program FilesxampphtdocsStaffLogin.php on line 29.

Throw the above Warning not executing the code………..

header(“location: http://localhost/StafDetail.php“);

Even not send data to the browser.

This is my php code,
—————–

<?PHP

$uNameErr = $pwdErr = “”;
$name = $pwd = “”;

if ($_SERVER[“REQUEST_METHOD”] == “POST” && $_POST[“btnEnter”] == 1 ) {

$action=-1;

if (empty($_POST[“txtUName”])) {
$uNameErr = “Name is required” ;
} else {
$name = test_input($_POST[“txtUName”]);

}

if (empty($_POST[“txtPwd”])) {
$pwdErr = “Password is required”;
} else {
$pwd = test_input($_POST[“txtPwd”]);
$action=1;

}
if($action==1){
header(“location: http://localhost/StafDetail.php”);exit;
}

}
—-

How to avoid this error.

Regards,
Sivakumar

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