<?php

$closure = function(){
        echo "クロージャ";
};

$closure();
echo "<hr/>";




function createCounter(){
        $count = 0;
        return function() use (&$count){
                return ++$count;
        };
}

$closure2 = createCounter();

echo $closure2();
echo "<hr/>";
echo $closure2();
echo "<hr/>";
echo $closure2();

表示結果

クロージャ

1

2

3

@see http://qiita.com/hugo-sb/items/3e344486658e3cfbd407