Kleine Korrektur:
#falsch:
header('Content-Type text/ics; charset=UTF-8')
# richtig:
~~~php
header('Content-Type: text/calendar; charset=UTF-8');
Kleine Korrektur:
#falsch:
header('Content-Type text/ics; charset=UTF-8')
# richtig:
~~~php
header('Content-Type: text/calendar; charset=UTF-8');