Почему моя страница не перенаправляет на успех

У меня есть код, который мне дали; существует переменная $ _POST (электронная почта), которая показывает как имеющую контент, но когда я тестирую ее с использованием isset , она терпит неудачу. Я не понимаю, почему он терпит неудачу; любая помощь будет принята с благодарностью!

Это код PHP:

<?php session_start(); echo "POST variables<br>"; var_dump($_POST); echo "<br><br>SESSION variables<br>"; var_dump($_SESSION); $itemcount = isset($_SESSION['itemcount']) ? $_SESSION['itemcount'] : 0; if ($itemcount == 0) { header("Location: "."error.php?msg=".rawurlencode("Please add items to your shopping cart before checking out.")); exit; } echo "POST email value: ".($_POST['email'])."<br>"; if (!isset($_POST['email'])) { // <-- FAILS HERE header("Location: "."error.php?msg=".rawurlencode("We did not find your information, please enter the needed information again.")); exit; } echo "server request method: ".$_SERVER['REQUEST_METHOD']; if ($_SERVER['REQUEST_METHOD'] == 'POST') { $_SESSION['shipname'] = $_POST['shipname']; $_SESSION['shipaddress'] = $_POST['shipaddress']; $_SESSION['shipzip'] = $_POST['shipzip']; $_SESSION['shipcity'] = $_POST['shipcity']; $_SESSION['shipstate'] = $_POST['shipstate']; $_SESSION['paymenttype'] = "PayPal"; header("Location: "."thankyou.php"); } $shipname = isset($_SESSION['shipname']) ? $_SESSION['shipname'] : ''; $shipaddress = isset($_SESSION['shipaddress']) ? $_SESSION['shipaddress'] : ''; $shipzip = isset($_SESSION['shipzip']) ? $_SESSION['shipzip'] : ''; $shipcity = isset($_SESSION['shipcity']) ? $_SESSION['shipcity'] : ''; $shipstate = isset($_SESSION['shipstate']) ? $_SESSION['shipstate'] : ''; ?> 

И это результаты эхо- заявлений:

 POST variables array(11) { ["lastname"]=> string(6) "dfgdfg" ["email"]=> string(22) "kelliemmarsh@gmail.com" ["city"]=> string(8) "van nuys" ["fax"]=> string(0) "" ["state"]=> string(2) "WA" ["firstname"]=> string(5) "dfbdf" ["address2"]=> string(0) "" ["phone"]=> string(12) "509-555-1414" ["zip"]=> string(5) "90266" ["address"]=> string(14) "123 any street" ["Continue"]=> string(8) "Continue" } SESSION variables array(8) { ["cart"]=> array(4) { [0]=> array(6) { [0]=> string(6) "ch-002" [1]=> string(6) "ch-002" [2]=> string(0) "" [3]=> string(0) "" [4]=> string(0) "" [5]=> string(0) "" } [1]=> array(6) { [0]=> string(26) "Fish Wavy Stripe Turquoise" [1]=> string(26) "Fish Wavy Stripe Turquoise" [2]=> string(0) "" [3]=> string(0) "" [4]=> string(0) "" [5]=> string(0) "" } [2]=> array(6) { [0]=> int(1) [1]=> int(2) [2]=> string(0) "" [3]=> string(0) "" [4]=> string(0) "" [5]=> string(0) "" } [3]=> array(6) { [0]=> string(5) "10.99" [1]=> string(5) "10.99" [2]=> string(0) "" [3]=> string(0) "" [4]=> string(0) "" [5]=> string(0) "" } } ["itemcount"]=> int(2) ["shipname"]=> NULL ["shipaddress"]=> NULL ["shipzip"]=> NULL ["shipcity"]=> NULL ["shipstate"]=> NULL ["paymenttype"]=> string(6) "PayPal" } POST email value: kelliemmarsh@gmail.com server request method: POST 

** ОБНОВЛЕНИЕ: это переработанный код с удаленными операциями «эхо»:

 <?php session_start(); $itemcount = isset($_SESSION['itemcount']) ? $_SESSION['itemcount'] : 0; if ($itemcount == 0) { header("Location: error.php?msg=rawurlencode("Please add items to your shopping cart before checking out.")); exit; } if (empty($_POST['email'])) { header("Location: "."error.php?msg=".rawurlencode("We did not all of the required information.")); exit; } else { $_SESSION['shipname'] = $_POST['shipname']; $_SESSION['shipaddress'] = $_POST['shipaddress']; $_SESSION['shipzip'] = $_POST['shipzip']; $_SESSION['shipcity'] = $_POST['shipcity']; $_SESSION['shipstate'] = $_POST['shipstate']; $_SESSION['paymenttype'] = "PayPal"; $shipname = isset($_SESSION['shipname']) ? $_SESSION['shipname'] : ''; $shipaddress = isset($_SESSION['shipaddress']) ? $_SESSION['shipaddress'] : ''; $shipzip = isset($_SESSION['shipzip']) ? $_SESSION['shipzip'] : ''; $shipcity = isset($_SESSION['shipcity']) ? $_SESSION['shipcity'] : ''; $shipstate = isset($_SESSION['shipstate']) ? $_SESSION['shipstate'] : ''; header("Location: "."thankyou.php"); } ?> 

 if (empty($_POST['email'])) { header("Location: "."error.php?msg=".rawurlencode("We did not find your information, please enter the needed information again.")); exit; }