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Re: An overloading question

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On 6/14/2011 2:32 PM, Denis McMahon wrote:
> On Tue, 14 Jun 2011 12:49:11 -0400, sheldonlg wrote:
>
>> I have a problem that I am wrestling with that should be so obvious and
>> easy -- but it isn't.  I have a base class that has a method that calls
>> another method in the base class with $this->thatOtherMethod.  I have
>> another class that extends the base class and I want to have
>> thatOtherMethod in the extended class override the one in the base
>> class.  The calling method in the base class is called using and
>> instance of the extended class pointing to that method.
>>
>> Simply, here is an example:
>>
>> A.class.php
>> --------------------------
>> <?php
>> abstract class A {
>>       public function b() {
>>           $this->a();
>>       }
>>       protected function a() {
>>           print 'In class A';
>>       }
>> }
>> ?>
>>
>> B.class.php
>> ---------------------------
>> <?php
>> include_once 'A.class.php';
>> class B extends A {
>>       public function a() {
>>           print 'In class B';
>>       }
>> }
>> ?>
>>
>> c.php
>> ----------------------------
>> <?php
>>      include 'B.class.php';
>>     $x = new B();
>>     $x->b();
>> ?>
>> ----------------------------
>>
>> I want it to print out "In class B", but it prints out "In class A".
>>
>> I have looked over Google quite a bit and found nothing that helped.  I
>> have tried making the methods public, protected, keep them both the same
>> access, etc. and have had no luck.  Suggestions?
>
> I think A->a() is being used as a constructor for the base class when you
> instantiate the extended class.
>
> This might (or might not) be causing confusion as to what's happening.
>
> This code:
>
> <?php
>
> abstract class A {
>
>       public function x() {
>           print "x() In class A\n";
>           $this->y();
>       }
>
>       public function y() {
>           print "y() In class A\n";
>       }
>
>       public function a() {
>           print "a() In class A\n";
>       }
>
> }
>
> class B extends A {
>
>       public function y() {
>           print "y() In class B\n";
>       }
>
> }
>
> print "instantiate\n";
>
> $x = new B();
>
> print "call function\n";
>
> $x->x();
>
> ?>
>
> gives:
>
> instantiate
> a() In class A
> call function
> x() In class A
> y() In class B
>
> Not sure, though, if that solves your problem or not?
>
> Rgds
>
> Denis McMahon

I modified B to give it an explicit constructor.  It still didn't work. 
  Why did your example print out that last line.  It was never called. 
Why did it use it as a constructor?  That doesn't seem to make sense.

-- 
Shelly

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An overloading question sheldonlg <sheldonlg@thevillages.net> - 2011-06-14 12:49 -0400
  Re: An overloading question Denis McMahon <denis.m.f.mcmahon@gmail.com> - 2011-06-14 18:32 +0000
    Re: An overloading question sheldonlg <sheldonlg@thevillages.net> - 2011-06-14 18:27 -0400
      Re: An overloading question Jerry Stuckle <jstucklex@attglobal.net> - 2011-06-14 19:12 -0400
        Re: An overloading question sheldonlg <sheldonlg@thevillages.net> - 2011-06-14 19:43 -0400
          Re: An overloading question Jerry Stuckle <jstucklex@attglobal.net> - 2011-06-14 20:45 -0400
            Re: An overloading question sheldonlg <sheldonlg@thevillages.net> - 2011-06-14 21:58 -0400
              Re: An overloading question Jerry Stuckle <jstucklex@attglobal.net> - 2011-06-14 22:08 -0400
              Re: An overloading question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-06-15 14:21 +0200
              Re: An overloading question sheldonlg <sheldonlg@thevillages.net> - 2011-06-15 12:55 -0400
        Re: An overloading question Michael Fesser <netizen@gmx.de> - 2011-06-15 18:04 +0200
          Re: An overloading question Jerry Stuckle <jstucklex@attglobal.net> - 2011-06-15 12:53 -0400
      Re: An overloading question Denis McMahon <denis.m.f.mcmahon@gmail.com> - 2011-06-15 03:41 +0000
      Re: An overloading question Michael Fesser <netizen@gmx.de> - 2011-06-15 18:02 +0200
  Re: An overloading question Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-06-15 14:01 +0200

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