Invoking static class functions within call_user_functions

Apparently there is no 'good' way to invoke static class functions
from within the call_user_function in PHP 5 (I'm using PHP 5 1.2).

Example:
------------
// Does php support something akin to C style function pointers??
//

class testClass
{
static function myFunction( $parm1 )
{
echo 'Hello, parm1 = '.$parm1."\n";
}
}

$className = 'testClass';
$fnName= 'myFunction';

// Are these legal?
//($fnPtr)('abc'); ... NOT LEGAL
//$fnPtr('abc'); ... NOT LEGAL

// call_user_func( $className, $fnPtr, 'abc' );

// Gah... need to instantiate static class members...
$x = new $className();
$x->{$fnName}('abc');
?>

----

There is documentation on php.net for call_user_func on how to invoke
it with a non-static class member, eg: call_user_func( 'classname',
'fnName', 'param1'... ).

The way that I've got it working feels like a kludge to me as I'm
having to instantiate an object that is never going to be used. (I'm
using static functions within the class as helper functions for my
application's data classes).

Thanks,

- Craig Taylor

Re: Invoking static class functions within call_user_functions

On Oct 25, 2:02 pm, Craig Taylor wrote:
> Apparently there is no 'good' way to invoke static class functions
> from within the call_user_function in PHP 5 (I'm using PHP 5 1.2).
>
> Example:
> ------------
> > // Does php support something akin to C style function pointers??
> //
>
> class testClass
> {
> static function myFunction( $parm1 )
> {
> echo 'Hello, parm1 = '.$parm1."\n";
> }
>
> }
>
> $className = 'testClass';
> $fnName= 'myFunction';
>
> // Are these legal?
> //($fnPtr)('abc'); ... NOT LEGAL
> //$fnPtr('abc'); ... NOT LEGAL
>
> // call_user_func( $className, $fnPtr, 'abc' );
>
> // Gah... need to instantiate static class members...
> $x = new $className();
> $x->{$fnName}('abc');
> ?>
>
> ----
>
> There is documentation on php.net for call_user_func on how to invoke
> it with a non-static class member, eg: call_user_func( 'classname',
> 'fnName', 'param1'... ).
>
> The way that I've got it working feels like a kludge to me as I'm
> having to instantiate an object that is never going to be used. (I'm
> using static functions within the class as helper functions for my
> application's data classes).
>
> Thanks,
>
> - Craig Taylor


Call a class (static) method:

call_user_func(array('testClass', 'myFunction'), $arg1, $arg2, $arg3);

Call an instance method:

$t = new testClass();
call_user_func(array($t, 'myFunction'), $arg1, $arg2, $arg3);

Re: Invoking static class functions within call_user_functions

Just what I was looking for...

When I had looked on php.net/call_user_func for this situation I saw
the example and misread it as not having the arrays - rechecked after
your post and my eyes are seeing it now... (that or the evil gremlin
that sneaks in my code is now messing with other people's sites
too... )

Thanks,


On Oct 25, 3:20 pm, ZeldorBlat wrote:
> On Oct 25, 2:02 pm, Craig Taylor wrote:
>
>
>
> > Apparently there is no 'good' way to invoke static class functions
> > from within the call_user_function in PHP 5 (I'm using PHP 5 1.2).
>
> > Example:
> > ------------
> > > > // Does php support something akin to C style function pointers??
> > //
>
> > class testClass
> > {
> > static function myFunction( $parm1 )
> > {
> > echo 'Hello, parm1 = '.$parm1."\n";
> > }
>
> > }
>
> > $className = 'testClass';
> > $fnName= 'myFunction';
>
> > // Are these legal?
> > //($fnPtr)('abc'); ... NOT LEGAL
> > //$fnPtr('abc'); ... NOT LEGAL
>
> > // call_user_func( $className, $fnPtr, 'abc' );
>
> > // Gah... need to instantiate static class members...
> > $x = new $className();
> > $x->{$fnName}('abc');
> > ?>
>
> > ----
>
> > There is documentation on php.net for call_user_func on how to invoke
> > it with a non-static class member, eg: call_user_func( 'classname',
> > 'fnName', 'param1'... ).
>
> > The way that I've got it working feels like a kludge to me as I'm
> > having to instantiate an object that is never going to be used. (I'm
> > using static functions within the class as helper functions for my
> > application's data classes).
>
> > Thanks,
>
> > - Craig Taylor
>
> Call a class (static) method:
>
> call_user_func(array('testClass', 'myFunction'), $arg1, $arg2, $arg3);
>
> Call an instance method:
>
> $t = new testClass();
> call_user_func(array($t, 'myFunction'), $arg1, $arg2, $arg3);