In what scenarios would it be more beneficial to use variables instead of ternary operators for string concatenation in PHP echo statements?

Using variables instead of ternary operators for string concatenation in PHP echo statements can be more beneficial in scenarios where the concatenation involves multiple conditions or complex logic. Using variables can make the code more readable, easier to debug, and maintain in the long run. It can also improve performance by reducing the complexity of the echo statement.

// Using variables for string concatenation instead of ternary operators
$greeting = "Hello, ";
$name = isset($user) ? $user : "Guest";
echo $greeting . $name;