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Bug #45620 Stacktrace reports wrong call type for static methods called from non-static
Submitted: 2008-07-25 02:45 UTC Modified: 2010-03-07 22:19 UTC
Votes:2
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:0 (0.0%)
From: kelvin at netbasic dot co dot uk Assigned:
Status: Not a bug Package: Scripting Engine problem
PHP Version: 5.2.6 OS: CentOS 5
Private report: No CVE-ID: None
View Developer Edit
 [2008-07-25 02:45 UTC] kelvin at netbasic dot co dot uk 
Description:
------------
When calling a static function from inside of a class the backtrace / stacktrace reports the call as a normal object call, i.e. its showing ->, where it really should show ::

Reproduce code:
---------------
<?php

	class testA
    {
    	public function funcA()
    	{
        	testB::funcB();
		}
    }


	class testB
    {
    	public function funcB()
    	{
    		echo "<pre>";
    		debug_print_backtrace();
    		echo "</pre>";
    	}
    }
    
    $obj = new testA();
    $obj->funcA();

?>

Expected result:
----------------
#0  testB::funcB() called at [/home/site3/public_html/t1.php:7]
#1  testA->funcA() called at [/home/site3/public_html/t1.php:23]



Actual result:
--------------
#0  testB->funcB() called at [/home/site3/public_html/t1.php:7]
#1  testA->funcA() called at [/home/site3/public_html/t1.php:23]

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 [2008-08-05 02:08 UTC] coen at bluedogtraining dot com dot au 
This is not just a stacktrace problem. If you were to attempt use '$this' in funcB you would find that '$this' is actually available and is an instance of class testA.

I stumbled on this accidentally.

<?php

class testA
{
    public function funcA()
    {
        testB::funcB();
    }
}

class testB
{
    public function funcB()
    {
        echo get_class($this);
    }
}
    
$obj = new testA();
$obj->funcA();

?>

Expected result:
----------------
nothing

Actual result:
--------------
testA

It appears as though the static method is being executed in the context of the calling object. Strange behaviour.
 [2009-01-22 01:12 UTC] jani@php.net 
Please try using this CVS snapshot:

  http://snaps.php.net/php5.2-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/
 [2009-01-30 01:00 UTC] php-bugs at lists dot php dot net 
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
 [2010-03-07 22:19 UTC] felipe@php.net
-Status: No Feedback +Status: Bogus
 [2010-03-07 22:19 UTC] felipe@php.net 
This behavior is expected, because the method is called by passing $this when it isn't explicity declared static.
 
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