How should session variables be accessed in PHP to avoid session-related problems?

To avoid session-related problems in PHP, session variables should be accessed using the `$_SESSION` superglobal array. This ensures that the variables are properly stored and retrieved from the session, reducing the risk of data corruption or security vulnerabilities. 

session_start();

// Access session variables using the $_SESSION superglobal
$_SESSION['username'] = 'john_doe';
echo $_SESSION['username'];

Keywords

session variables PHP access session-related problems error types

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