016 SQL-Datatypes
https://www.w3schools.com/sql/sql_datatypes.asp

016 MySQL
https://dev.mysql.com/doc/

016 SQL-Tutorial
https://www.w3schools.com/sql/

016 Did-you-forget-your-mysql-password-Follow-this-link-to-reset.
https://devanswers.co/how-to-reset-mysql-root-password-ubuntu/

018 Mysql-Prepared-Statements
https://www.w3schools.com/php/php_mysql_prepared_statements.asp

018 HTML-Forms
https://www.w3schools.com/html/html_forms.asp

018 PHP-Super-Globals
https://www.php.net/manual/en/language.variables.superglobals.php

019 PHP-MD5
https://www.php.net/manual/en/function.md5.php

019 MySQL-INSERT-INTO
https://www.w3schools.com/sql/sql_insert.asp

020 PHP-Sessions
https://www.php.net/manual/en/book.session.php

020 PHP-die-function
https://www.w3schools.com/php/func_misc_die.asp

020 PHP-header-function
https://www.php.net/manual/en/function.header.php

021 PHP-query-function
https://www.php.net/manual/en/mysqli.query.php

021 HTML-Tables
https://www.w3schools.com/html/html_tables.asp

021 PHP-fetch-assoc-function
https://www.php.net/manual/en/mysqli-result.fetch-assoc.php