wordpress - Modify Contact Form 7 Submission Data

Question

I'm using Contact Form 7 on a site and need to alter the checkbox submitted data. The checkbox has a label called 'Tick here if you dont want to receive further marketing', when this is checked the value sent in the admins notification email displays the checkbox label. So it looks like:

Tick here if you dont want to receive further marketing: Tick here if you dont want to receive further marketing

I want to alter it so when its checked the value posted is No.

I believe I can use the following action hook to achieve this but I dont know how to check if the checkbox has been ticked within this function and modify its value.

Any help much appreciated.

// define the wpcf7_posted_data callback 
function action_wpcf7_posted_data( $array ) { 
// make action magic happen here... 
}; 

// add the action 
add_action( 'wpcf7_posted_data', 'action_wpcf7_posted_data', 10, 1 );

Answer 1

I believe you can just use:

// define the wpcf7_posted_data callback 
function action_wpcf7_posted_data( $array ) { 
    //'checkbox-name' is the name that you gave the field in the CF7 admin.
    $value = $array['checkbox-name'];
    if( !empty( $value ) ){
        $array['checkbox-name'] = "New Value";
    }

    return $array;
}; 
add_filter( 'wpcf7_posted_data', 'action_wpcf7_posted_data', 10, 1 );