add "38" to phone number when posted cf7 data

[Mari7777777]

Add this to functions.php
cnahge telephone-feedback to our own field name.

function action_wpcf7_posted_data( $array ) {
$value = $array['telephone-feedback'];
if( !empty( $value ) ){
$array['telephone-feedback'] = "38".$value;
}
return $array;
};
add_filter( 'wpcf7_posted_data', 'action_wpcf7_posted_data', 10, 1 );