rename name in contact from 7 before submit

Question

Im trying to rename name of input in contact from 7. There is integration with google sheets, and name of input must be same as is named a column in the sheet. Issue is when you need two words name, its not supported.

Here is code what should rename input:

function custom_rename_form_field($contact_form) {
    $submission = WPCF7_Submission::get_instance();
    if ($submission) {
        $data = $submission->get_posted_data();
        
        if (isset($data['jaky-obchod'])) {
            $jakyObchodValue = $data['jaky-obchod'];
            
            unset($data['jaky-obchod']);
            
            $data['Jaký obchod'] = $jakyObchodValue;
            
            $submission->set_posted_data($data);
        }
    }
}

But im getting error 500.

name "jaky-obchod" should be renamed to "Jaký obchod" before contact from 7 send data

Answer 1

What about this ? Try wpcf7_before_send_mail hook instead of wpcf7_submit...

add_action('wpcf7_before_send_mail', 'custom_rename_form_field');

function custom_rename_form_field($contact_form) {
    $submission = WPCF7_Submission::get_instance();
    if ($submission) {
        $data = $submission->get_posted_data();
        
        if (isset($data['jaky-obchod'])) {
            $jakyObchodValue = $data['jaky-obchod'];
            
            unset($data['jaky-obchod']);
            
            $data['Jaký_obchod'] = $jakyObchodValue;
            
            $submission->set_posted_data($data);
        }
    }
}