php - How to change the FREE label to Price on Request and include a button to request a price if the user is logged in -

i have put in functions.php , works, showing contact form 7 submit button in place of "free!" cant seem if statement correct disabling button non logged in user. there somthing have missed?

//remove free when 0  add_filter( 'woocommerce_variable_free_price_html','remove_free_price_text' );  add_filter( 'woocommerce_free_price_html','remove_free_price_text' );  add_filter( 'woocommerce_variation_free_price_html','remove_free_price_text' );  function remove_free_price_text( $price ) {  if ( is_user_logged_in() )   echo do_shortcode( '[contact-form-7 id="3696" title="request price"]' );  elseif ( !is_user_logged_in() ) return 'price upon request';         } 

try

if ( is_user_logged_in() ){    echo do_shortcode( '[contact-form-7 id="3696" title="request price"]' ); }else{    echo('price upon request'); }