Pass PHP variable from html to php and email template

You can do that in 3 ways. Injecting a var in the link, using a session or using a cookie. Personally I suggest sessions because users can't modify them and they expire when the user close his browser.

You need to rename index.html to index.php so you can insert php code into this file, then you'll need to write something like this:

<?php
session_start();
$_SESSION['name'] = "value";
?>

Doing so you setted the session, now each time you need to call the session use this code:

<?php
session_start();
$var = $_SESSION['name'];
?>

Now you use

echo "$var";

Where you wanna print the var

Don't forget session_start(); or you won't be able to call or set sessions

If you wanna do this using a cookie or injecting the var into the url feel free to ask and I'll explain you how ;)

Your code in sendmail.php is a little bit messed, here the fixed one:

<?php
include "class.smtp.php";
include "class.phpmailer.php";
session_start();
$email = $_REQUEST['email'] ;
$message = $_REQUEST['message'] ;
$_SESSION['message'] = $message;

$Body = file_get_contents('email-template.php');
...
...
?>

Then in email-template.php you'll use this code:

<table border="1">
     <tr>
        <td colspan="2">
          <h3>
            <?php
              session_start();
              $message = $_SESSION['message'];
              echo "Your registration is: ".$message.".";
            ?>
          </h3>
        </td>
     </tr>
   </table>

Why don't you try to put some message placeholder in email-template.html and later replace it with the real message in sendmail.php

For example: email-template.html

<table border="1">
 <tr>
 <td colspan="2">
    <h3>{{message-placeholder}}</h3>
</td>
</tr>
</table>

And then in sendmail.php

<?php
include "class.smtp.php";
include "class.phpmailer.php";
session_start();
$email = $_REQUEST['email'] ;
$message = $_REQUEST['message'] ;
$_SESSION['message'] = $message;

$Body = file_get_contents('email-template.php');
$Body = str_replace('{{message-placeholder}}', $message, $Body);
...
...
?>

http://php.net/str_replace

That way you'll have the html template and you might also have some very basic templating. You'll also get rid of that session stuff

For those who are still facing this problem, I think this is what it's all about.

In the template the string(s) to be displayed should be specified (with special characters) instead of printing by php.

email_template.php

<table border="1">
 <tr>
    <td colspan="2">
      <h3>
        Your Registration number is: #registration_number#
      </h3>
    </td>
 </tr>

Back in sendmail.php the template should be opened and read (using fopen and fread) and the specified string should be replaced using str_replace before mailing

sendmail.php

<?php
include "class.smtp.php";
include "class.phpmailer.php";
session_start();

$email = $_REQUEST['email'] ;
$message = $_REQUEST['message'] ;
$_SESSION['message'] = $message;

$template_loc = fopen("../path/to/email_template.php");
$template_read = fread($template_loc, filesize("../path/to/email_template.php"));
$template_read = str_replace("#registration_number#", $message, $template_read);

$Body = $template_read;  #or directly use $template_read as body
...
...
?>

Suggestions: 1) CSS in email templates should always be inline. 2)For sending emails 3rd party APIs offer more functionalities, such as tracking the sent emails, etc.

Try something like this

$name = 'John Doe';    
$vars = ('NAME' => $name);
$message = file_get_contents('email_template.html');
foreach($vars as $search => $replace){
    $message = str_ireplace('%' . $search . '%', $replace, $message); 
}
mail('[email protected]', 'Subject', $message, $headers);

So email_template.html will have %NAME% inside of it, str_ireplace will replace it by John Doe and you will send the variable $message as the email html.

I think this is the best practice.

I think it will help you.