|
|
Posted by Matthew Weier O'Phinney on 08/10/05 21:53
* Thomas Angst <ta_php@granitsoft.ch>:
> I would like to create an object inside a function with its classname
> and a parameter list submitted by the function call.
>
> function create($class, $parameter) {
> $obj = new $class($parameter);
> return $obj;
> }
>
> This is working very well. But I have not every time the same count of
> parameters for a class constructor.
> If this is a normal method call of an object I can realise it like this:
>
> $ret = call_user_func_array(array(&$obj, 'method'), $parameter_array);
> The $parameter_array contains as many entries as the function needs.
> Works well too.
>
> But how can I write a function to instance objects with various count of
> parameters in the constructor?
> I know, can do this with an eval. But I would like to find a solution
> where I don't need an eval.
Use the func_* functions, along with array_shift(). In addition, you'll
need to use either a standard-named static instantiator, or the class
name as the constructor method:
function create($class) {
$args = func_get_args();
array_shift($args); // remove $class from the args list
// Do this if using a standard-named static instantiator method
// across classes; in this case 'init':
return call_user_func_array(array($class, 'init'), $args);
// Or use a function named after the class name as the instantiator
// method (ala PHP4):
return call_user_func_array(array($class, $class), $args);
}
--
Matthew Weier O'Phinney
Zend Certified Engineer
http://weierophinney.net/matthew/
Navigation:
[Reply to this message]
|