How can using the $_POST superglobal in PHP help prevent issues related to register_globals and improve the security and reliability of scripts that handle user input?

Using the $_POST superglobal in PHP helps prevent issues related to register_globals by explicitly accessing form data that has been submitted via the POST method. This improves security and reliability of scripts that handle user input because it ensures that variables are not automatically registered in the global scope, reducing the risk of variable injection attacks. 

$username = $_POST['username'];
$password = $_POST['password'];

// Use $username and $password variables in your script

Keywords

$_POST superglobal register_globals security reliability

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