Using __clone() 1

[kyru]

Anyone knows how is this function used? It's supposed to create an identical copy of an existing and it's also supposed that the function doesn't have to be declared on it's corresponding class.

But in real I do the following thing and it doesn't work:

$first=new Prueba2("9","2","3","4");
$second=$first->__clone();

In fact, even declarating a __clone() function into the class Prueba2, it doesn't work.

I'm using last PHP version (5.2.8), in the case that could influence.

Thanks in advance.

 

[jpadie]

you clone an object just by doing this

$newObj = clone $oldObj;

the __clone method of the class is only instantiated if it exists in the class definition for $oldObj. if there is no method specified then the object will simply be cloned.

beware that cloning using clone may not be quite what you want in each case. references, for example, are maintained.

By contrast, if you want to do a deep clone (breaking references but maintain property values) then you might try this

$newObj = unserialize(serialize($oldObj));