Titles are case sensitive to catch out unwanted programs sharing the same titles that some providers use ( Example: Movistar [Option: 3] 'Juego de tronos' are real episodes, 'Juego de Tronos' are unwanted commentary episodes ).
If this becomes a program then case sensitivity can be ignored by adding modifier 'i' to 'preg_match' ( Example: preg_match('/'.$string1.'/iu', $string2))' )