<?php
$a = 1;
$b = function() use ($a) {
function c()
{
global $a;
$a++;
echo("C: ".$a . '</br>');
}
echo($a . '</br>');
c();
echo($a . '</br>');
};
$b();
echo( "At end: ". $a);
?>
PD9waHAKJGEgPSAxOwogCiRiID0gZnVuY3Rpb24oKSB1c2UgKCRhKSB7ICAKIAogICAgZnVuY3Rpb24gYygpCiAgICB7CiAgICAgICAgZ2xvYmFsICRhOwogICAgICAgICRhKys7CiAgICAgICAgZWNobygiQzogIi4kYSAuICc8L2JyPicpOwogICAgfQogCiAgICBlY2hvKCRhIC4gJzwvYnI+Jyk7CiAgICBjKCk7CiAgICBlY2hvKCRhIC4gJzwvYnI+Jyk7Cn07CiAKJGIoKTsKZWNobyggIkF0IGVuZDogIi4gJGEpOwo/Pgo=