PHP Mailto isn't sending variables

Question

I have trouble with sending emails on my website.

Here is a code:

$to  = 'xx@xx.com' . ', ';
$to .= 'yy@xx.com';
$subject = 'Potwierdzenie zakupu.';
$message = '$_POST[dostawa]';



$headers =
'MIME-Version: 1.0' . "\r\n" .
'Content-type: text/html; charset=utf-8' . "\r\n" .
'From: xx@xx.com' . "\r\n" .
    'Reply-To: xx@xx.com' . "\r\n" .
    'X-Mailer: PHP/' . phpversion();

mail($to, $subject, $message, $headers);

When I put text in my message it's sending text but if I put some variables it's sending $_POST[dostawa] I can print this variables before and after this code with echo.

Answer 1

Change from

$message = '$_POST[dostawa]';

into

$message = $_POST['dostawa'];

Answer 2

由于它是单引号php认为它是字符串建议您将它放在双引号中

$message = "$_POST[dostawa]";