[UPHPU] Child class references static variable of parent instead of its own

[Richard K Miller]

On Aug 17, 2007, at 6:23 AM, Walt Haas wrote:

> On Thu, 2007-08-16 at 17:39 -0600, Richard K Miller wrote:
>> Here's an OOP question that perplexes me. It seems PHP doesn't treat
>> static variables correctly in child classes
>> ....
>> WHAT I EXPECTED:
>> Regular variable in ABC
>> Static variable in ABC
>> Regular variable in DEF
>> Static variable in DEF
>>
>> ACTUAL OUTPUT:
>> Regular variable in ABC
>> Static variable in ABC
>> Regular variable in DEF
>> Static variable in ABC <--- This is different from what I expected
>>
>> Anyone know why?
>
> Actually a better terminology to describe these variables is "class
> variables" vs. "instance variables".  A static variable is bound to  
> the
> class definition itself, while a non-static variable gets a new  
> instance
> of the variable with each "new" instance of the class.

Yes, those are much more descriptive and helpful to understanding.

By the way, here is the section from a meeting on PHP 6 that mentions  
their deliberations on late static binding, as Alvaro said:

http://www.php.net/~derick/meeting-notes.html#late-static-binding- 
using-this-without-or-perhaps-with-a-different-name