Add filter hook

Hi,

First of all thank you for fabulous Contact Form 7 – Dynamic Text Extension plugin.

I have a peculiar need though.. I’ve crated a contact page for each service on a webiste I’m building.. so each service (there are 7) are the parent page for each contact page. Because of that and the website has support for 9 languages, what I’ve done is add the recipient email for every service page and then get that field within the contact page like this:

get_field('recipient_email', $post->post_parent);

I checked your code and in my case instead of retrieving the $post_id I need the $post->post_parent:

So from this
if(isset($post)) $post_id = $post->ID; Original line

To this:
if(isset($post)) $post_id = $post->post_parent;

I would rather not modify the original code, so I can get future updates. Maybe you could add a filter hook and then apply_filter(), so I could apply my change without changing your code ??

Thanks!
Lluc

This is the original code:
/* Insert a Custom Post Field
 * New in 1.0.4
 */
function cf7_get_custom_field($atts){
        extract(shortcode_atts(array(
                'key' => '',
                'post_id' => -1,
                'obfuscate'     => 'off'
        ), $atts));

        if($post_id < 0){
                global $post;
                //if(isset($post)) $post_id = $post->ID; Original line
                if(isset($post)) $post_id = $post->post_parent; // My line
        }

        if($post_id < 0 || empty($key)) return '';

        $val = get_post_meta($post_id, $key, true);

        if($obfuscate == 'on'){
                $val = cf7dtx_obfuscate($val);
        }

        return $val;

}
add_shortcode('CF7_get_custom_field', 'cf7_get_custom_field');