What is the correct way to call a function that is returned from a closure in PHP?

When a function is returned from a closure in PHP, you can call it by assigning the closure to a variable and then invoking that variable as a function. This allows you to access and execute the function that was defined within the closure.

// Define a closure that returns a function
$closure = function() {
    return function() {
        echo "Hello from the returned function!";
    };
};

// Assign the returned function to a variable
$innerFunction = $closure();

// Call the returned function
$innerFunction();