Autofill a form of another website and send it

Question

I searched the web and found nothing.

On the website, there is a Input box for a E-Mail address. I would like to fill this field with an e-mail address and the send

Answer 1

You will need to look at the form action attribute. This should point you to the script the form is posted to. When you have that information you can send a POST request to that url using curl or when in php,

$postdata = http_build_query(
    array(
        'email' => 'youremailaddress'
    )
); 
$opts = array('http' =>
    array(
        'method'  => 'POST',
        'header'  => 'Content-type: application/x-www-form-urlencoded',
        'content' => $postdata
    )
);

$context  = stream_context_create($opts);

$result = file_get_contents('http://example.com/submit.php', false, $context);