wp_mail - using a custom field value

Question

Can this work? I want to send a email when a post is published to the recipient, that is called in custom field.

EDIT I changed the code to another example I found.

function wpr_Notification($post_id) {
    $post = get_post($post_id);
    $to = get_post_meta($post_id, 'recipient', true);
    $headers = 'From: Disctopia Metal Webzine <admin@disctopia.de>';
    $title = $post->post_title." has been published";
    $message = " Hello ... and so on.... ";

    wp_mail($to, $title, $message, $headers); 
} 
add_action('publish_post', 'wpr_Notification');

Everything works smooth except for the recipient. If I put an static email adress into this field instead of $to, it works. But if I try to get the value of the custom field, it fails.

I tried to see whats the value of $to by putting it into the $message and changing the $to to my own email adress. Well, there was no value at all for the $to.

What is wrong with this variable? The custom field definitely is called "recipient" and is just a text-string.

:(

Answer 1

Yes, it can work. But you should filter the email in the custom field. Users might have a error in his context or the mail address is wrong.

You can filter the email address with filter_var()