What potential issues can arise when working with $_SERVER['LOGON_USER'] in PHP?

When working with $_SERVER['LOGON_USER'] in PHP, one potential issue is that it may not be available on all server configurations, especially if the server is not running on Windows. To solve this issue, you can check if the $_SERVER['LOGON_USER'] variable is set before using it to avoid any errors. 

if(isset($_SERVER['LOGON_USER'])) {
    $logon_user = $_SERVER['LOGON_USER'];
    // Use $logon_user variable for further processing
} else {
    echo "LOGON_USER not available on this server configuration";
}

Keywords

$_SERVER LOGON_USER authentication Windows security

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