跨页面的会话变量

Question

所以我创建了一个登录表单，将变量传递给login.php

的login.php

<?php
{
    require_once("db_const.php");
    $mysqli = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
    # check connection
    if ($mysqli->connect_errno) {
        echo "<p>MySQL error no {$mysqli->connect_errno} : {$mysqli->connect_error}</p>";
        exit();
    }

    $email = $_POST['email'];
    $password = $_POST['password'];

    $sql = "SELECT * from patient_details WHERE email LIKE '{$email}' AND password LIKE '{$password}' LIMIT 1";
    $result = $mysqli->query($sql);
    $row=mysqli_fetch_array($result);

    if (!$result->num_rows == 1) {
        echo "<p>Invalid username/password combination</p>";
    } else {
        $_SESSION['email'] = $row['email'];
        header('Location: dashboard.php');

    }
}
?>      

登录检查工作正常......但会话变量不起作用。所以我试着在login.php中回应它。它在那里工作..但它不适用于另一页。在这种情况下，dashboard.php

Dashboard.php

<?php
// page2.php

session_start();

echo 'Welcome to page #2<br />';

echo $_SESSION['email']; // green

?>