Re: $arr = array('Hello', 'world') ; $arr();

From: Date: Wed, 08 Jun 2011 11:39:08 +0000
Subject: Re: $arr = array('Hello', 'world') ; $arr();
Groups: php.internals 
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Hi,



Hi all,
Reading our bug tracker I noticed a good feature request [1] from 2009 which
points to an interesting feature that I think makes sense for us, since we
are now working with $f() using objects and strings, and the array('class',
'method') is an old known for call_user_func()-like functions.

So, I wrote a patch [2] that allow such behavior to be consistent with
arrays. See some examples:

class Hello {
   public function world($x) {

      echo "Hello, $x\n"; return $this;

   }
}

$f = array('Hello','world');
var_dump($f('you'));

$f = array(new Hello, 'foo');
$f();

All such calls match with the call_user_func() behavior related to magic
methods, static & non-static methods.

The array to be a valid callback should be a 2-element array, and it must be
for the first element object/string and for the second string only. (just
like our zend_is_callable() check and opcodes related to init call)

Any thoughts?




what happens if I use this code.

class Foo {

   public $bar;

   public function __construct() {


      $this->bar = array($this, 'baz');
      $this->bar();

   }

   public function bar() {

      echo 'bar';

   }

   public function baz() {

      echo 'baz';

   }
}

new Foo();

What is the output of this snippet?

Are there the same rules as for closures?

Christian

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