What are some potential pitfalls of using session_register and session_unregister in PHP?

Using session_register and session_unregister functions in PHP is not recommended as they have been deprecated since PHP 5.3 and removed in PHP 5.4. Instead, you should use the $_SESSION superglobal array to set and unset session variables. 

// To set a session variable
$_SESSION['variable_name'] = 'value';

// To unset a session variable
unset($_SESSION['variable_name']);

Keywords

session_register session_unregister PHP session variables deprecated

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