Ошибка в методе POST

<form action="reg.php" method="post">
<fieldset>
    <legend>Образование</legend>
    <label>Название организации:<input type="text" name="name" id="name"></label>
    <label>Услуга:<br><input type="text" name="service" id="service"></label>
    <label>Условия:<br><textarea name="facility" id="facility"></textarea>
    <label>Адрес:<br><input type="text" name="address" id="address"></label>
    <label>Контакты:<br><input type="text" name="contact" id="contact"></label>
    <input type="hidden" name="item" value="education">
    <input type="submit" value="Добавить" id="submit4">
</fieldset>

if ($_POST['item'] == education) {
    $name = $_POST['name'];
    $service = $_POST['service'];
    $facility = $_POST['facility'];
    $address = $_POST['address'];
    $contact = $_POST['contact'];
    
    echo $sql = "INSERT INTO education(name, service, facility, address, contact) VALUES('$name', '$service', '$facility', '$address', '$contact')";
    /*$res = mysql_query($sql);
    
    if ($res) 
        header("location: ../index.php?do=show&item=service");  */
    
}

$text = iconv("cp1251", "UTF-8", $text);

print_r($_POST);

if ($_POST['item'] == 'education')