|
|
| Re: Discovering all sub-classes via introspection? [message #171510 is a reply to message #171509] |
Fri, 07 January 2011 03:40   |
Jerry Stuckle
Messages: 2598
Registered: September 2010
Karma: 0
|
Senior Member |
|
|
On 1/6/2011 10:38 PM, Roy Smith wrote:
> Given a class, is there a way to find all the classes which extend it?
No. There is no way to know if ANY class extends it, unless the class
has been instantiated.
A basic concept of OO programming - derived classes know about the base
class, but base classes don't know anything about derived classes.
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex(at)attglobal(dot)net
==================
|
|
|
|
|
|
| Re: Discovering all sub-classes via introspection? [message #171519 is a reply to message #171512] |
Fri, 07 January 2011 13:15 |
Jerry Stuckle
Messages: 2598
Registered: September 2010
Karma: 0
|
Senior Member |
|
|
On 1/6/2011 11:08 PM, Sherm Pendley wrote:
> Roy Smith<roy(at)panix(dot)com> writes:
>
>> Given a class, is there a way to find all the classes which extend it?
>
> Use get_declared_classes() to get a list of classes, then loop over
> the list and use is_subclass_of() on each item to check if it extends
> your target class.
>
> sherm--
>
Which only works if you have included all the files containing the
derived classes.
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex(at)attglobal(dot)net
==================
|
|
|
|
| Re: Discovering all sub-classes via introspection? [message #171541 is a reply to message #171519] |
Sat, 08 January 2011 14:57 |
RMP
Messages: 6
Registered: December 2010
Karma: 0
|
Junior Member |
|
|
Am 07.01.2011 14:15, schrieb Jerry Stuckle:
> On 1/6/2011 11:08 PM, Sherm Pendley wrote:
>> Roy Smith<roy(at)panix(dot)com> writes:
>>
>>> Given a class, is there a way to find all the classes which extend it?
>>
>> Use get_declared_classes() to get a list of classes, then loop over
>> the list and use is_subclass_of() on each item to check if it extends
>> your target class.
>>
>> sherm--
>>
>
> Which only works if you have included all the files containing the
> derived classes.
>
Maybe you'll find something in the Reflection of PHP (>5):
http://de3.php.net/manual/de/book.reflection.php
There you find Reflection::getExtension and
Reflection::getInterfaceNames which could solve it.
--
greetings,
rmp
|
|
|
|
| Re: Discovering all sub-classes via introspection? [message #171542 is a reply to message #171541] |
Sat, 08 January 2011 16:34 |
Jerry Stuckle
Messages: 2598
Registered: September 2010
Karma: 0
|
Senior Member |
|
|
On 1/8/2011 9:57 AM, _RMP wrote:
> Am 07.01.2011 14:15, schrieb Jerry Stuckle:
>> On 1/6/2011 11:08 PM, Sherm Pendley wrote:
>>> Roy Smith<roy(at)panix(dot)com> writes:
>>>
>>>> Given a class, is there a way to find all the classes which extend it?
>>>
>>> Use get_declared_classes() to get a list of classes, then loop over
>>> the list and use is_subclass_of() on each item to check if it extends
>>> your target class.
>>>
>>> sherm--
>>>
>>
>> Which only works if you have included all the files containing the
>> derived classes.
>>
>
> Maybe you'll find something in the Reflection of PHP (>5):
> http://de3.php.net/manual/de/book.reflection.php
>
> There you find Reflection::getExtension and
> Reflection::getInterfaceNames which could solve it.
>
Which still only works if you have included all the files containing the
derived classes.
--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex(at)attglobal(dot)net
==================
|
|
|
|
|
|
Calendar
Search
Help
Members
Register
Login
Home
]