note 77522 added to function.call-user-func

I don't entirely understand why PHP's OOP is structured as it is. I'm attempting to design a virtual class, which is meant to sort-of emulate C++'s multiple inheritance with classes, since I can't find it in PHP. I wanted to take advantage of PHP's loose class structure, which allows you to call any non-static method in the scope of any class (as long as the method is accessible). However, it seems that call_user_func() (and by relation call_user_func_array()) does not make its calls in the scope of the class, which is something I don't get. I'm trying to use callback to call the defined bases' constructors, and also in __call() to call the bases' functions using $this->func(). So far, the only way is to use eval(). I'm running PHP 5.2.2, part of XAMPP (for Windows). Code Example: <?php class Base { var $name="Tim", $age; function __construct($age=12) { $this->age=$age; echo "Base of age $age!<br>"; } } class Test { function __construct() { Base::__construct(); //It's not inherited, yet this works perfectly //What you think would work call_user_func(array("Child","__construct")); //But it doesn't - it's not in scope //Using the method levi stated on the call_user_func_array() page, but not using 'parent' (since it's not the parent) call_user_func(array($this,"Child::__construct")); //This doesn't work either - I tried it with parent, and it worked (when one was defined) //I don't think I can test what serge belychev suggested, since I'm running 5.2.2 at the moment call_user_func("Child::__construct"); //? Will it do the same thing as the others? //After revising this post a little, I realized I had forgotten about eval() eval("Child::__construct();"); //This actually works! However, it's slower and a pain to pass arguments //Crappy solution for arguments: Before eval, store arguments in array, and then add $arg[0],$arg[1],... etc to function call echo $this->age; } } $obj=new Test(); ?> There are two ways that I'm thinking of to resolve this: > Use a different method of callback, allowing the class to be defined in the function name, > rather than the first argument of the array > Have call_user_func[...]() called in the scope classes, if applicable. I don't see any exra downfalls that could happen with this. I'll post an example of that virtual class once I upload the next version of Thacmus (http://sourceforge.net/projects/thacmus/). ---- Server IP: 69.147.83.197 Probable Submitter: 74.192.112.67 ---- Manual Page -- http://www.php.net/manual/en/function.call-user-func.php Edit -- https://master.php.net/note/edit/77522 Del: integrated -- https://master.php.net/note/delete/77522/integrated Del: useless -- https://master.php.net/note/delete/77522/useless Del: bad code -- https://master.php.net/note/delete/77522/bad+code Del: spam -- https://master.php.net/note/delete/77522/spam Del: non-english -- https://master.php.net/note/delete/77522/non-english Del: in docs -- https://master.php.net/note/delete/77522/in+docs Del: other reasons-- https://master.php.net/note/delete/77522 Reject -- https://master.php.net/note/reject/77522 Search -- https://master.php.net/manage/user-notes.php