M ist ab Version 4.1 definierbar. php.net: PHP-Handbuch: Original PHP-Handbuch in deutscher Sprache. Use Currency converter to calculate any amount of USD to PHP exchange rate. M ist ab Version 4.1 definierbar. timestamp without time zone : Displayed as 'YYYY-MM-DD HH:MM:SS'. function canReturnNullorString(): ?string) However resource is not allowed as a return type: