How can you update PHP scripts that use session_is_registered() for a protected area, considering it is deprecated in PHP 5.4 and newer versions?

The session_is_registered() function is deprecated in PHP 5.4 and newer versions, so it should not be used in updated PHP scripts. To update PHP scripts that use session_is_registered() for a protected area, you can replace it with isset() to check if a variable is set in the $_SESSION superglobal array. 

// Before
if(session_is_registered('username')) {
    // Protected area code
}

// After
if(isset($_SESSION['username'])) {
    // Protected area code
}

Keywords

PHP session_is_registered() deprecated migration session variables

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