preg_replace_callback, class method?

[Kimmo Laine]

I tried to use a class member function as a callback in
preg_replace_ca llback, but failed. It announces: " Warning:
preg_replace_ca llback() [function.preg-replace-callback]: requires argument
2, 'myclass::myfun ction', to be a valid callback in ..."

I tried both myclass::myfunc tion and $this->myfunction, neither worked. Is
there really no way of using a class member as a callback, it has to be an
external function? That sucks... :(



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"Ohjelmoija on organismi joka muuttaa kofeiinia koodiksi" - lpk
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[Colin Fine]

Re: preg_replace_ca llback, class method?

Kimmo Laine wrote:

I tried to use a class member function as a callback in
preg_replace_ca llback, but failed. It announces: " Warning:
preg_replace_ca llback() [function.preg-replace-callback]: requires argument
2, 'myclass::myfun ction', to be a valid callback in ..."
>
I tried both myclass::myfunc tion and $this->myfunction, neither worked. Is
there really no way of using a class member as a callback, it has to be an
external function? That sucks... :(
>
>
>

From

http://uk.php.net/manual/en/language.pseudo-types.php#language.types.callback:

"Some functions like call_user_func( ) or usort() accept user defined
callback functions as a parameter. Callback functions can not only be
simple functions but also object methods including static class methods.

"A method of an instantiated object is passed as an array containing
an object as the element with index 0 and a method name as the element
with index 1.

"Static class methods can also be passed without instantiating an object
of that class by passing the class name instead of an object as the
element with index 0. "

Colin

[Kimmo Laine]

Re: preg_replace_ca llback, class method?

"Colin Fine" <news@kindness. demon.co.ukwrot e in message
news:egehjm$de9 $1$8302bc10@new s.demon.co.uk.. .

Kimmo Laine wrote:

>I tried to use a class member function as a callback in
>preg_replace_c allback, but failed. It announces: " Warning:
>preg_replace_c allback() [function.preg-replace-callback]: requires
>argument 2, 'myclass::myfun ction', to be a valid callback in ..."
>>
>I tried both myclass::myfunc tion and $this->myfunction, neither worked.
>Is there really no way of using a class member as a callback, it has to
>be an external function? That sucks... :(
>>
>>
>>

From

http://uk.php.net/manual/en/language.pseudo-types.php#language.types.callback:

>
"Some functions like call_user_func( ) or usort() accept user defined
callback functions as a parameter. Callback functions can not only be
simple functions but also object methods including static class methods.
>
"A method of an instantiated object is passed as an array containing an
object as the element with index 0 and a method name as the element with
index 1.
>
"Static class methods can also be passed without instantiating an object
of that class by passing the class name instead of an object as the
element with index 0. "
>

Thanks Colin!

Altough it turned out I don't actually need this after all I found a nicer
solution, it's good to know it works. I did try it and this works just
perfectly:

<?php

class Foo {
public function __construct(){
echo preg_replace_ca llback(
'/./', array(get_class ($this), 'bar'), 'lorem ipsum' );
}

private function bar($matches){
return strtoupper($mat ches[0]);
}

}

$my_foo = new Foo();

?>


--
"Ohjelmoija on organismi joka muuttaa kofeiinia koodiksi" - lpk
http://outolempi.net/ahdistus/ - Satunnaisesti päivittyvä nettisarjis
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