What are the advantages of using static file names in PHP scripts instead of dynamically changing them based on session data?

When using static file names in PHP scripts instead of dynamically changing them based on session data, it helps improve security by reducing the risk of injection attacks or file manipulation. Static file names also make the code easier to read and maintain as it clearly defines the file being accessed. Additionally, using static file names can improve performance by reducing the need to dynamically generate file names.

// Using static file names in PHP script
$file = "data.txt";
$data = file_get_contents($file);
echo $data;