Funktionaler Taschenrechner in PHP
Fatal error: Uncaught TypeError: Unsupported operand types: string + string in /home/.sites/10/site5622882/web/unger/ikt22-25/gruber.kilian/php/taschenrechner.php:22
Stack trace:
#0 {main}
thrown in /home/.sites/10/site5622882/web/unger/ikt22-25/gruber.kilian/php/taschenrechner.php on line 22