WordPress External PHP File

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I have a newsletter form in my wordpress site which supposed to be used through the shortcode : 

<form action="newsletter.php" method="post">
... 
</form>

And the shortcode should look :

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[newsletter]

In my theme option i have an input field to enter the email address. That value needs to be stored in newsletter.php in the variable $to

How can i ‘connect’ the newsletter.php with the wordpress get_option for that input i have?

newsletter.php : 

<?php
$email = $_POST['news'];

// --- this should be the option from the wordpress panel -------
$to = "mail@mail.com";
// ---------------------------------


$subject = "newsletter request";


$date = date("d-m-Y");


$email_message = " Newsletter request : rn";
$email_message .= " ================================================== rn ";
$email_message .= "This user wants to be notified about your website launch : ".$email."rn";
$email_message .= " ================================================== rn";
$email_message .= " Request was sent " .$date. " rn";

$headers = 'From: '.$email."rn";


if($email != null && $email != ""){

mail($to,$subject,$email_message,$headers);
}

header("location:../index.php");

?>

I tried with REQUIRE_ONCE but, that isn’t working…

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1 comment

  1. Well you have to create a plugin, I am giving instruction to create a simple plugin. I say again SIMPLE. And its not the only way to create a plugin, but it will be easy one for you.

    Create a file in plugins folder and do code like this

    /**
 * @package Simple Plugin
 * @version 0.0.1
 */
/*
Plugin Name: Usman
Author: Muhammad Usman
Version: 0.0.1
*/

function showpage($content)
{
    if(stristr($content,'[myplugin]'))
        {
         if(isset($_POST['your-field']))
         {
          //Write your code
          //Save fields or so

          $content="Form submitted";
         }


    }

    return $content;
}

add_filter("the_content","showpage");

    Activate this plugin from admin panel and create a page, write [myplugin] in content. And give your form action to this page’s permalink.

    More details can be found at http://codex.wordpress.org/Writing_a_Plugin