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Learn closures in PHP 5.3: function() use(&$param)

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Release: 2016-07-25 09:07:42
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  1. function closureCreater(){

  2. $x =1;
  3. return function($fun=null) use(&$x){//Pass value by reference
  4. echo "
    ".$x++;
  5. $fun and $fun();
  6. };
  7. }

  8. $x = "hello world";

  9. $test = closureCreater( );
  10. $test();
  11. $test(function(){ echo "closure test one"; });
  12. $test(function(){ echo "closure test two"; });
  13. $test(function( ) use($x){ echo "
    ".$x;});
  14. //Save the function as an array element
  15. $x = 'outer param.';
  16. $arr = array() ;
  17. $arr[] = function($str)use($x){ return $str.$x; };
  18. echo $arr[0]('test fun in arr,'); //test fun in arr ,outer param.
  19. ?>

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