How do I immediately execute an anonymous function in PHP?

Question

In JavaScript, you can define anonymous functions that are executed immediately:

(function () { /* do something */ })()

Can you do somethin

Answer 1

In PHP 7 is to do the same in javascript

$gen = (function() {
    yield 1;
    yield 2;

    return 3;
})();

foreach ($gen as $val) {
    echo $val, PHP_EOL;
}

echo $gen->getReturn(), PHP_EOL;

The output is:

1
2
3

Answer 2

Well of course you can use call_user_func, but there's still another pretty simple alternative:

<?php
// we simply need to write a simple function called run:
function run($f){
    $f();
}

// and then we can use it like this:
run(function(){
    echo "do something";
});

?>

Answer 3

Not executed inmediately, but close to ;)

<?php

$var = (function(){ echo 'do something'; });
$var();

?>