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Bug #63578 is_callable returns false with __call
Submitted: 2012-11-22 06:31 UTC Modified: 2012-11-22 08:01 UTC
From: pierre at pcservice dot co dot za Assigned: dmitry (profile)
Status: Not a bug Package: *General Issues
PHP Version: Irrelevant OS: mac & linux
Private report: No CVE-ID: None
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From: pierre at pcservice dot co dot za
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 [2012-11-22 06:31 UTC] pierre at pcservice dot co dot za
Description:
------------
When you have a class that have a __call magic method, when calling is_callable 
with an array and the first argument a string, it returns false.


Test script:
---------------
Class Foo {
    public function __call($method, $args) {}
}

var_dump(is_callable(array('Foo', 'bar')));
var_dump(is_callable(array(new Foo, 'bar')));

Expected result:
----------------
true
true

Actual result:
--------------
false
true

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 [2012-11-22 07:08 UTC] laruence@php.net
-Status: Open +Status: Not a bug -Assigned To: +Assigned To: dmitry
 [2012-11-22 07:08 UTC] laruence@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

Class Foo {
    public function __call($method, $args) {}
}

Foo::bar();

//result in
Fatal error: Call to undefined method Foo::bar()
 [2012-11-22 07:50 UTC] pierre at pcservice dot co dot za
so when calling is_callable(array('Foo', 'bar')), if the method doesn't exist, 
it only looks for a static method?

with the following

class Controller {

    public function testAction()
    {

    }

    public static function staticAction()
    {

    }

    public function __call($method, $arguments)
    {

    }
}


is_callable(array(new Controller, 'testAction'));
is_callable(array(new Controller, 'staticAction'));
is_callable(array(new Controller, 'fooAction'));
is_callable(array('Controller', 'testAction'));
is_callable(array('Controller', 'staticAction'));
is_callable(array('Controller', 'fooAction'));



everything returns true except for the last call.
Shouldn't it return true as well, since the class has the magic __call method?
Or the documentation should then at least specify that is_callable only works 
with the __call method, if the first parameter of the array is an instance of 
the object
 [2012-11-22 08:01 UTC] dmitry@php.net
is_callable(array(new Controller, 'fooAction')); // call of a regular method

_call() works fine.

is_callable(array('Controller', 'fooAction')); // attempt to call a static method

__call() doesn't try to call static methods, so is_callable() returns false.
 
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