为什么我的页面忽略了标题（'Location：home /'）; 码？

Question

I have a login script that checks user credentials against a database, and if they are correct will assign them a session then forward them to the home screen.

For some reason, it will not forward, but will happily output text that appears after it should have read the forwarding code.

<?php
//require_once('scripts/include.php');
require_once('scripts/includePDO.php');

$error = '';
$form = $_POST['submit'];
$email = $_POST['email'];
$password = $_POST['password'];

if( isset($form) ) {
if( isset($email) && isset($password) && $email !== '' && $password !== '' ) {

$sql = "SELECT * FROM tbl_users WHERE email = :email and password = :password";

$q   = $conn->prepare($sql);
        $q->bindValue(':email',$email,PDO::PARAM_STR);
        $q->bindValue(':password',$password,PDO::PARAM_STR);
        $q->execute();

            $r = $q->fetch(PDO::FETCH_ASSOC);
            if(($r)!=0)

{ //success

$answer = $r['id'];

$_SESSION['logged-in'] = true;
$_SESSION['who'] = $answer;

echo "This text echos no probelm";

//If the login details are entered and they match those in the database, forward to new page.
header('Location: home/');

echo "Even this text will be shown";

exit;

// If information is wrong or missing, provide error message.
} else { echo "Sorry, something hasn't worked. Are you entering all the information correctly?"; }
} 

}

?>

Answer 1

There should be no output sent to the browser before the header statement. You will get headers already sent error(if enabled)

echo "This text echos no probelm";