How can the use of anonymous functions improve readability and efficiency in PHP object manipulation?

Using anonymous functions in PHP object manipulation can improve readability by allowing the developer to define a callback function inline, right where it's needed, without the need to create a separate named function. This can make the code easier to follow and understand. Additionally, using anonymous functions can improve efficiency by reducing the overhead of defining and calling a separate function.

// Example of using anonymous functions in PHP object manipulation
$numbers = [1, 2, 3, 4, 5];

// Using array_map with an anonymous function to square each number
$squaredNumbers = array_map(function($num) {
    return $num * $num;
}, $numbers);

print_r($squaredNumbers); // Output: [1, 4, 9, 16, 25]