header('Content-Type: text/html; charset=utf-8');
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<b>Warning</b>:  session_start(): Cannot start session when headers already sent in <b>/home/showapps/painelteste.showapp.store/sistema_financeiro/auth.php</b> on line <b>2</b><br />
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<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /home/showapps/painelteste.showapp.store/sistema_financeiro/index.php:1) in <b>/home/showapps/painelteste.showapp.store/sistema_financeiro/auth.php</b> on line <b>5</b><br />