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Warning: Undefined variable $connection in /users/balu52/www/Temperatur/req_delete.php on line 9

Fatal error: Uncaught Error: Call to a member function query() on null in /users/balu52/www/Temperatur/req_delete.php:9 Stack trace: #0 {main} thrown in /users/balu52/www/Temperatur/req_delete.php on line 9