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https://stackoverflow.com/questions/15758185/php-mysql-injection-example
https://www.youtube.com/watch%3Fv%3DglScQ9qqMlI
http://www.google.de/url?url=http://www.securityidiots.com/Web-Pentest/SQL-Injection/bypass-login-using-sql-injection.html
http://www.google.de/url?url=http://www.sqlinjection.net/login/
https://www.w3schools.com/sql/sql_injection.asp
https://de.slideshare.net/prady00/sql-injection-in-action-with-php-and-mysql