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PHP with mySQL

Everything you need is here... https://www.php.net/manual/en/ https://dev.mysql.com/doc/refman/5.7/en/introduction.html
- August 2, 2021
1 point
Shorthand for "exit if variable is not set"

This is where that ?? operator you tried earlier would come in. It will prevent that error from occurring by providing a default value if the variable isn't set. You can also avoid the if using && if you wanted, though one could argue over which is better from a readability standpoint. ($_SESSION["username"]??'') != 'admin' && exit;
- August 2, 2021
1 point

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