What is the potential issue with $_SESSION variables being overwritten by normal variables in PHP scripts?

The potential issue with $_SESSION variables being overwritten by normal variables in PHP scripts is that it can lead to unexpected behavior or loss of session data. To solve this issue, you can use a naming convention to differentiate between normal variables and session variables, such as prefixing all session variables with "sess_" to avoid conflicts. 

// Set session variable
$_SESSION['sess_username'] = 'john_doe';

// Normal variable
$username = 'jane_smith';

// Access session variable
echo $_SESSION['sess_username'];

Keywords

$_SESSION variables overwritten PHP scripts scope

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