Creating and invoking an anonymous function in a single statement

Question

A php closure or anonymous function is used to create function without specifying its name.

Is it possible to call them without assigning to identifier as we do in JavaScript ? e.g.

(function(){
    echo('anonymous function');
})();

What is the correct use of use construct while defining anonymous function and what is the status of anonymous function in public method with accessibility to private properties?

$anon_func = 
function($my_param) use($this->object_property){ //use of $this is erroneous here
    echo('anonymous function');
};

Answer 1

PHP 7 added the ability to do this.

This code:

(function() { echo "This works as expected in PHP 7.\n"; })();

works as one would expect in PHP 7. (It still doesn't work in any PHP 5.x. release)

Answer 2

call_user_func(function() use(closure-vars){ ... });