'php dynamic class inheritance

I know I can generate a class at runtime by executing

$obj = (object)array('foo' => 'bar');+

this way I can use

echo $obj->foo; //bar

What if want to make $obj inherits from an existing class?

What I wanna achive: I'm forking paris project on github (https://github.com/balanza/paris). It's an active record class. I wonder I need to declare a class for every object, even if it's empty:

class User extends Model{}

I guess I might use dynamic object to avoid this boring stuff.

phpinheritanceruntimedynamicobjectdynamic-class-creation


Solution 1:[1]

You could always do eval('class User extends Model{}') but is not a good idea. Really, you should just create the class in a file, then opcode caching will work properly, it can be version tracked, etc etc.

tl;dr: Define the model class, it is the Right Thing To Do™.

Solution 2:[2]

If there is really no other way for you to do it, you can create a "dynamic" inheritance with my Dynherit class. It creates the inheritance you want but from files and only with classes you didnt already loaded.

Download v0.62 : http://optimisationphp.komrod.com/source/sha/test/dynamic_inheritance_01/dynherit_v0.62.zip

GitHub link : https://github.com/Komrod/Dynherit

Solution 3:[3]

Strictly to your question, the only way I can see it possible is by using Runkit, which let's you re-declare classes on the fly. Not sure how portable that solution is.

Solution 4:[4]

You can use a Prototype design pattern to clone an object, then you can add everything you need in cloned one

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 shadowhand
Solution 2 Komrod
Solution 3 mhitza
Solution 4 Ilya Kolesnikov

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