Trip Advisor Social Link

I have followed the guides here and added the code to php file and uploaded fontello but cant get it to work can you please help.

PHP file is:

// Register new icon as a theme icon
function avia_add_custom_icon($icons) {
$icons[‘tripadvisor’] = array( ‘font’ =>’tripadvisor’, ‘icon’ => ‘uf262’);
return $icons;
}
add_filter(‘avf_default_icons’,’avia_add_custom_icon’, 10, 1);

// Add new icon as an option for social icons
function avia_add_custom_social_icon($icons) {
$icons[‘Trip Advisor’] = ‘tripadvisor’;
return $icons;
}
add_filter(‘avf_social_icons_options’,’avia_add_custom_social_icon’, 10, 1);

Please can you help as I am at a loss