Untitled

<?php if ($_SERVER['REQUEST_METHOD'] === 'GET') { ?>
<!DOCTYPE HTML>
<head>
<title>Email Registration Form</title>
<style>
        li {list-style: none;}
</style>
        <link rel="stylesheet" href="form.css" type="text/css" />
</head>
<body>
<h2>Enter details regarding your email creation</h2>
<ul>
function validateform() {
        var e = document.forms["insert"]["email"].value;
        if (e == "") {
                alert("Email field is empty");
                return false;
        }
        var n = document.forms["insert"]["Password"].value;
        if (n == "") {
                alert("Password cannot be blank");
                return false;
        }
        var rn = document.forms["insert"]["realname"].value;
        if (rn == "") {
                alert("Please enter your name");
                return false;
}
<form name="insert" action="register.php" onsubmit="return validateForm()" method="POST" >
        <li>Email:</li><li><input type="text" name="email" placeholder="example@darkorderofchaos.com" /></li>
        <li>Password:</li><li><input type="text" name="password" placeholder="Password" /></li>
        <li>Name:</li><li><input type="text" name="realname" placeholder="John Doe" /></li>
        <li><input type="submit" value="Create Email" /></li>
        <input type="reset" value="Reset Form">
</form>
</ul>
</body>
</html>
<?php } else
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $db = pg_connect("host=localhost port=5432 dbname=mail user=mailreader password=**********") or die('pg_last_error()');
    $result = pg_query_params($db, "insert into users(email, password, realname, maildir) values ($1,$2,$3,$1 || '/')",
        array($_POST["email"], hash('SHA512',$_POST["password"]), $_POST["realname"]));
    print($result);
}
?>