Fatal Error on Polymorphism

[Kesavan]

I need polymorphism in php.
When I run this following code I get the following error.
Fatal error: Cannot redeclare aClass::aPrint( ) in C:\Program Files
\xampp\htdocs\k 7\prCls.php on line 16

How I rectify it?


<?php

class aClass{

function aPrint($name){
echo $name;
}

function aPrint($name,$a ge){
echo $name;
echo $age;
}

}

$myClass = new aClass;
$myClass->aPrint('Kesava n');

$myClass2 = new aClass;
$myClass2->aPrint('Kesava n',24);
?>

/
*************** *************** *************** *************** *************** *************** **************/
Kesavan M
m.kesavan@hotma il.com

[Michael Fesser]

Re: Fatal Error on Polymorphism

..oO(Kesavan)

>I need polymorphism in php.
>When I run this following code I get the following error.
>Fatal error: Cannot redeclare aClass::aPrint( ) in C:\Program Files
>\xampp\htdocs\ k7\prCls.php on line 16
>
>How I rectify it?
>
>
><?php
>
> class aClass{
>
> function aPrint($name){
> echo $name;
> }
>
> function aPrint($name,$a ge){
> echo $name;
> echo $age;
> }
>[...]

PHP doesn't support that. But you could make $age an optional argument
and check inside the function whether it was passed or not:

function aPrint($name, $age = NULL) {
print $name;
print !is_null($age) ? $age : '';
}

Micha

[Kesavan]

Re: Fatal Error on Polymorphism

On Mar 1, 11:47 am, Michael Fesser <neti...@gmx.de wrote:

.oO(Kesavan)
>
>
>

I need polymorphism in php.
When I run this following code I get the following error.
Fatal error: Cannot redeclare aClass::aPrint( ) in C:\Program Files
\xampp\htdocs\k 7\prCls.php on line 16

>

How I rectify it?

>

<?php

>

class aClass{

>

function aPrint($name){
echo $name;
}

>

function aPrint($name,$a ge){
echo $name;
echo $age;
}
[...]

>
PHP doesn't support that. But you could make $age an optional argument
and check inside the function whether it was passed or not:
>
function aPrint($name, $age = NULL) {
print $name;
print !is_null($age) ? $age : '';
}
>
Micha

Thanks Michael,

Your trick help's me..,
Isn't PHP fully OOP language/

Kesavan M
m.kesavan@hotma il.com

[Erwin Moller]

Re: Fatal Error on Polymorphism

Kesavan wrote:

On Mar 1, 11:47 am, Michael Fesser <neti...@gmx.de wrote:

>.oO(Kesavan)
>>
>>
>>

>I need polymorphism in php.
>When I run this following code I get the following error.
>Fatal error: Cannot redeclare aClass::aPrint( ) in C:\Program Files
>\xampp\htdocs\ k7\prCls.php on line 16

>>

>How I rectify it?

>>

><?php

>>

class aClass{

>>

function aPrint($name){
echo $name;
}

>>

function aPrint($name,$a ge){
echo $name;
echo $age;
}
>[...]

>>
>PHP doesn't support that. But you could make $age an optional argument
>and check inside the function whether it was passed or not:
>>
> function aPrint($name, $age = NULL) {
> print $name;
> print !is_null($age) ? $age : '';
> }
>>
>Micha

>
Thanks Michael,
>
Your trick help's me..,
Isn't PHP fully OOP language/

No, it isn't: go Java or C++ or something like that if you want 'real'
method overloading.
The support PHP gives for OOP is enough to get almost all tasks done.


Regards,
Erwin Moller

>
Kesavan M
m.kesavan@hotma il.com

[Michael Fesser]

Re: Fatal Error on Polymorphism

..oO(Kesavan)

>Your trick help's me..,
>Isn't PHP fully OOP language/

Method overloading is not necessarily a feature required to be an OOP
language. Usually you will find that feature in statically-typed
languages, where the compiler can decide which function to call by
looking at the types of the passed arguments. In dynamically-typed
languages it's much more difficult, if not impossible. I don't know if
there's any scripting language at all that supports that.

Micha