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Warning: Trying to access array offset on value of type bool in /usr/local/www/gymnazium/resize_image.php on line 11

Warning: Trying to access array offset on value of type bool in /usr/local/www/gymnazium/resize_image.php on line 12

Fatal error: Uncaught DivisionByZeroError: Division by zero in /usr/local/www/gymnazium/resize_image.php:14 Stack trace: #0 {main} thrown in /usr/local/www/gymnazium/resize_image.php on line 14