So, I have been working on this mail function for the last hour or so, but I can't figure out why it is not sending out the email! I have tried multiple times, altering the code and trying to make it perfect, but still, I have not received the test email...
I have HTML in my email, however, that is not the problem, as I have tested it out without the HTML.
MY PHP:
$to = $register_data['email'];
        $subject = "Welcome!";
        $body = '
            <html>
                <head>
                    <style>
                        body{
                            background-color: #FFF;
                            font-family: arial;
                            margin: 0;
                            padding: 0;
                        }
                        a{
                            color: inherit;
                            text-decoration: none;
                        }
                        .outer-email{
                            width: 80%;
                            height: auto;
                            margin: 0 auto;
                        }
                        .info-email{
                            width: 80%;
                            margin: 120px auto;
                        }
                        .outer-header h3{
                            font-size: 2.9em;
                            color: #151515;
                            margin: 0;
                        }
                        .inner-email{
                            margin-top: 20px;
                        }
                        .inner-email span{
                            font-size: 1.3em;
                            color: #151515;
                        }
                    </style>
                </head>
            <body>
                <div class="outer-email">
                    <div class="info-email">
                        <div class="outer-header">
                            <h3>Welcome!</h3>
                        </div>
                        <div class="inner-email">
                            <span>Welcome, $register_data['fname'];
                            </span>
                        </div>
                    </div>
                </div>
            </body>
            </html>
        ';
        $headers .= "Content-type: text/html; charset=iso-8859-1\r\n";
        $headers .= 'From: Domain <noreply@domain.com>';
        mail($to, 'Welcome!', $body, $headers);
Please don't class this as a duplicate either, because I have tested ALOT of the other forum questions on this topic, and they didn't solve my problem! :(
Thanks
EDIT: My register function on page:
if(empty($_POST) === false && empty($errors) === true) {
            $register_data = array(
                'username'      => $_POST['username'],
                'password'      => $_POST['password'],
                'fname'         => $_POST['fname'],
                'lname'         => $_POST['lname'],
                'email'         => $_POST['email'],
                'type'          => $_POST['type'],
                'email_code'    => md5($_POST['username'] + microtime())
            );
            register($register_data, $conn);
            redirect('register.php?success');
            exit();
        } else if (empty($errors) === false)  {
            echo error_output($errors);
        }
UPDATE::
Ok, so I've figured out that if I upload it onto my published server, It does in fact work, so it must've been a problem on my localhost... Thanks @MarkP
 
     
     
    