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Warning: session_start(): Session cannot be started after headers have already been sent in /hp/ct/aa/tp/www/qrcode/logout.php on line 13

Warning: session_destroy(): Trying to destroy uninitialized session in /hp/ct/aa/tp/www/qrcode/logout.php on line 14

Warning: Cannot modify header information - headers already sent by (output started at /hp/ct/aa/tp/www/qrcode/lib/MysqliDb/MysqliDb.php:833) in /hp/ct/aa/tp/www/qrcode/logout.php on line 20