#47765 [NEW]: __invoke lacks if object is a static property or return

From: Date: Tue, 24 Mar 2009 19:10:07 +0000
Subject: #47765 [NEW]: __invoke lacks if object is a static property or return
Groups: php.doc.bugs 
Request: Send a blank email to doc-bugs+get-2039@lists.php.net to get a copy of this message
From:             biohazard999 at gmx dot at
Operating system: Windows XP SP3
PHP version:      Irrelevant
PHP Bug Type:     Documentation problem
Bug description:  __invoke lacks if object is a static property or return

Description:
------------
If the object to invoke is stored in a static property or is returned by a
static function __invoke will not be called.
Especially for singletons is this extremly missleading.

Either it is an documentation problem or something other is wrong.

Actual documentation:
The __invoke method is called when a script tries to call an object as a
function. 

Reproduce code:
---------------
class foo
{
  public static $instance = null; //only public for this example

  public static function get()
  {
    if(is_null(self::$instance))
      self::$instance = new self;

    return self::$instance;
  }

  public function __invoke($name)
  {
    echo 'Hello '.$name;
  }
}

//1)
foo::get()('World');

//2)
foo::get();
foo::$instance('World');

//3)
$bar = foo::get();
$bar('World');

Expected result:
----------------
1) //Here is the parsing-error partial expected
Hello World

2)
Hello World

3)
Hello World

Actual result:
--------------
1)
Parse error: parse error in test.php on line 23

2)
Notice: Undefined variable: instance in test.php on line 27
Fatal error: Function name must be a string in test.php on line 27

3)
Hello World //Behavior as expected

-- 
Edit bug report at http://bugs.php.net/?id=47765&edit=1
-- 
Try a CVS snapshot (PHP 5.2):        http://bugs.php.net/fix.php?id=47765&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):        http://bugs.php.net/fix.php?id=47765&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):        http://bugs.php.net/fix.php?id=47765&r=trysnapshot60
Fixed in CVS:                        http://bugs.php.net/fix.php?id=47765&r=fixedcvs
Fixed in CVS and need be documented: http://bugs.php.net/fix.php?id=47765&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=47765&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=47765&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=47765&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=47765&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=47765&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=47765&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=47765&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=47765&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=47765&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=47765&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=47765&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=47765&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=47765&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=47765&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=47765&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=47765&r=mysqlcfg



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