Hi,
i have the following classes:
class A
{
public function EchoMe($txt)
{
echo $txt;
}
}
class B extends A
{
...
}
in theory i can write something like that:
$b = new B();
$b-EchoMe(test);
and i should get echo test on screen.
am i correct ?
--
Alain
Using extends means that a class IS-A substructure of its parent class(es).
EXAMPLE:
class plant { };
class tree extends plant { };
class apple_tree extends tree { };
apple_tree inherits all methods and attributes from plant and tree
So if there was a methods plant-growth() you can also call it
Alain Roger schreef:
Hi,
i have the following classes:
class A
{
public function EchoMe($txt)
{
echo $txt;
}
}
class B extends A
{
...
}
in theory i can write something like that:
$b = new B();
$b-EchoMe(test);
and i should get echo test on screen.
am i
Ok,
I have a class which inherits from a parent class. My first thought is that
the child class inherits all of the functions of the parent but that doesn't
seem to be the case, do I really have to put parent::somefunction() to call
each one? Why can't I just use $this-parentfunction(); within
12, 2006 11:00 AM
To: php-general@lists.php.net
Subject: [PHP] inheritance php4
Ok,
I have a class which inherits from a parent class. My first thought is that
the child class inherits all of the functions of the parent but that doesn't
seem to be the case, do I really have to put parent
PROTECTED]
Sent: Tuesday, December 12, 2006 11:00 AM
To: php-general@lists.php.net
Subject: [PHP] inheritance php4
Ok,
I have a class which inherits from a parent class. My first thought is that
the child class inherits all of the functions of the parent but that doesn't
seem to be the case, do I
Hi
I'm with PHP for 4 years now but have feeling that my code doesn't
have much order. I only started to use functions, it helped me a lot
but I believe if I would learn to wirk with classes that would be
what I need.
The question:
I have class A, class B, and class C
now class C extends B
Hi,
I would like to post the following question related to an inheritance
problem with PHP OO programming :
With an object of a subclass, I call a method of the parentclass in order
to modify an attribute of the parentclass. It does work correctly but later
when I call the display method of
Hi,
Sunday, December 1, 2002, 10:05:53 PM, you wrote:
BC Hi,
BC I would like to post the following question related to an inheritance
BC problem with PHP OO programming :
BC With an object of a subclass, I call a method of the parentclass in order
BC to modify an attribute of the
At 13:05 01.12.2002, Bernard Chamberland said:
[snip]
Hi,
[snip]
[...omitting long code post...]
Bernard,
couple of things:
a) Class Ressource uses instance data ($this-) in the constructor. You
shouldn't call this
Hi all,
Was just wondering which is the better way to call an inherited method from
a child class?
Example:
class foo {
function jk() {
echo In here!;
}
}
class bar extends foo {
function do_something() {
//Either this one...
$this-jk();
//Or this
be okay... but I'd use $this-jk() anyway,
just to keep it all in the object (just in case...)
Martin
-Original Message-
From: Jarrad Kabral [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, October 09, 2002 11:18 AM
To: [EMAIL PROTECTED]
Subject: [PHP] Inheritance Question
Hi all,
Was just
different to what I know and does (is) causing confusion.
Debbie
- Original Message -
From: Debbie Dyer [EMAIL PROTECTED]
To: Rasmus Lerdorf [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Wednesday, October 02, 2002 11:41 PM
Subject: Re: [PHP] Inheritance and a class function: on what class
Assume you've got some class that has one or more classes inherited from it.
The parent class has a function that is normally called using the ::
operator (a class function). Assume also that the class function is never
called from an object function. Is it possible to find if the class
-foo();
Is this what you mean?
Debbie
- Original Message -
From: Nick Eby [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, October 02, 2002 6:29 PM
Subject: [PHP] Inheritance and a class function: on what class was it
called?
Assume you've got some class that has one or more
ROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, October 02, 2002 6:29 PM
Subject: [PHP] Inheritance and a class function: on what class was it
called?
Assume you've got some class that has one or more classes inherited from
it.
The parent class has a function that is normally call
PM
Subject: Re: [PHP] Inheritance and a class function: on what class was it
called?
not quite... the case I'm interested in is this, given your example:
print C::foo();
which would print nothing, unfortunately, since when the function is
called
using the :: operator
should've used the term static from
the beginning.
/nick
- Original Message -
From: Debbie Dyer [EMAIL PROTECTED]
To: Nick Eby [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Wednesday, October 02, 2002 11:33 AM
Subject: Re: [PHP] Inheritance and a class function: on what class was it
called?
I
-
From: Nick Eby [EMAIL PROTECTED]
To: Debbie Dyer [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Wednesday, October 02, 2002 7:53 PM
Subject: Re: [PHP] Inheritance and a class function: on what class was it
called?
when you call a function with -, you must call it on an object
($c-foo
The mistake is mine not yours. I know about the :: operator I use it all the
time (but within classes parent::function() etc) - but I never realised
until now that PHP will let you use any class before instantiation (and
nearly all my PHP work uses classes). I have never even attempted to try
get_class($this); }
}
Class B extends A {}
B::staticFunc();
thanks again
/nick
- Original Message -
From: Rasmus Lerdorf [EMAIL PROTECTED]
To: Debbie Dyer [EMAIL PROTECTED]
Cc: Nick Eby [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Wednesday, October 02, 2002 3:08 PM
Subject: Re: [PHP
::staticFunc();
thanks again
/nick
- Original Message -
From: Rasmus Lerdorf [EMAIL PROTECTED]
To: Debbie Dyer [EMAIL PROTECTED]
Cc: Nick Eby [EMAIL PROTECTED]; [EMAIL PROTECTED]
Sent: Wednesday, October 02, 2002 3:08 PM
Subject: Re: [PHP] Inheritance and a class function: on what
PROTECTED]
Sent: Wednesday, October 02, 2002 11:28 PM
Subject: Re: [PHP] Inheritance and a class function: on what class was it
called?
Since static method calls are completely disconnected from any class
instance asking which class the method call is from is rather meaningless,
and no, I don't
have
to know on what class they were called. anyway thanks again
/nick
- Original Message -
From: Rasmus Lerdorf [EMAIL PROTECTED]
To: Nick Eby [EMAIL PROTECTED]
Cc: Debbie Dyer [EMAIL PROTECTED];
[EMAIL PROTECTED]
Sent: Wednesday, October 02, 2002 3:28 PM
Subject: Re: [PHP] Inheritance
I have a class Foo{} which has a method Print().
I have another class FooBar{} which extends Foo{} and has its own method
Print().
How do I invoke Foo{}'s Print() method from within FooBar{} once its been
overridden?
Jason White
ðÒÉ×ÅÔ!
Jason White wrote:
I have a class Foo{} which has a method Print().
I have another class FooBar{} which extends Foo{} and has its own method
Print().
How do I invoke Foo{}'s Print() method from within FooBar{} once its been
overridden?
parent::print();
if you have multilayered
ðÒÉ×ÅÔ!
if you have multilayered inheritance you may explicitely say which
anceStor class you are calling, like foo::print().
two typos in a few words are definitely too much, sorry :)
BTW, although almost all class specification is dynamic you cannot
dynamically specify a class name in
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