学习 PHP 5.3 的闭包: function() use(&$param)

3. function closureCreater(){

4. $x =1;
5. return function($fun=null) use(&$x){//按引用传值
6. echo "
   ".$x++;
7. $fun and $fun();
8. };
9. }

10. $x = "hello world";

11. $test = closureCreater();
12. $test();
13. $test(function(){ echo "closure test one"; });
14. $test(function(){ echo "closure test two"; });
15. $test(function() use($x){ echo "
    ".$x;});
17. //将函数保存为数组元素
18. $x = 'outer param.';
19. $arr = array();
20. $arr[] = function($str)use($x){ return $str.$x; };
21. echo $arr[0]('test fun in arr,'); //test fun in arr,outer param.
22. ?>

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