- strpos: documentation ( source)
- strtolower: documentation ( source)
<?php
$hotel_name = 'Апартаменты 123';
if ( strpos(strtolower($hotel_name), 'апарт') !== false || strpos(strtolower($hotel_name), 'apart') ) {
echo '!!!';
}
$hotel_name = 'Apartments 123';
if ( strpos(strtolower($hotel_name), 'apart') ) {
echo '!!!';
}