gistfile1.txt

<?php 
if($_POST['email'] != '') {


                    $db = mysqli_connect('localhost', 'cl54-sstats', '******', 'cl54-sstats') OR die('Database Connection Error.');

                    $email = mysqli_real_escape_string($_POST['email']);

                    $sql = "INSERT INTO mailing (email) VALUES ('$email')";

                    if (mysqli_query($sql, $db)) {
                        echo "New record created successfully";
                    } else {
                        echo "Error: " . $sql . "<br>" . mysqli_error($db);
                    }

            }
?>

        <form action="index.php" method="POST">
		<input type="email" placeholder="Your Email Address" name="email"  style="font-size:1.7em;font-weight:none;text-align:center;" />
		<input type="submit" value="submit" />
	</form>