PHP Guru -- here's a tough one!

[qw12er]

1) Why can't I use '$this' since when $func() is executed it will be in foo's object context ? (So $this should be available ?!)
2) How can I avoid this problem ? (cause I really need to call a function from class foo)

class foo{

public function internal(){
print 'Hello world.';
}

public function __call($method, $args){
if(isset($this->$method)){
$func = $this->$method;
$func();
}
}
}

$f = new foo();
$f->bar = function () {$this->internal();};
$f->bar();

[CS-Jay]

it's late for me, but isn't it

foo::internal();

[qw12er]

foo::internal(); would work except for the fact that I really need $this because internal() normally use $this->properties...

I've oversimplified my example. Sorry.
This would be more accurate :

class foo{
public $msg;

public function interne(){
print $msg;
}

public function __call($method, $args){
if(isset($this->$method)){
$func = $this->$method;
$func();
}
}
}

$f = new foo();
$f->msg = 'hello';
$f->bar = function () {foo::interne();};
$f->bar();

foo::interne(); won't 'know' that $f->msg has been set...

I also tryed call_user_func_array(array($f, 'bar'), array()); instead of $f->bar without success

Thanks for you help... specially at this hour.

[Tempest]

What version of PHP are you using?

[qw12er]

php 5.3.0

[Tempest]

I can't even do anonymous functions as none of my php versions are 5.3 or above.

Are you getting an error or is just not working? If error, what line is giving you the error?

[qw12er]

Ok it's possible to do this :

$f->bar = function () use ($f) {$f->internal();};

but I need to dynamicaly build my function with create_function (since the body of my function is passed to me as a string) how do I work with the keyword "use" then ?

[qw12er]

bump 8char

[mlove]

I'm not a programmer, just a sysadmin, but perhaps it relates to register_globals being disabled?

[borked]

can't help really as I'm on 5.2.x, so all this isn't available, but according to http://php.net/manual/en/migration53.incompatible.php

The call_user_func() family of functions now propagate $this even if the callee is a parent class.

goto http://php.net/manual/en/function.call-user-func.php
scroll down to user comment by
chris at NOSPAM dot panospheric dot com
23-Sep-2007 02:37

this looks like what you are trying to do?

hope it helps

[qw12er]

Originally Posted by borked

can't help really as I'm on 5.2.x, so all this isn't available, but according to http://php.net/manual/en/migration53.incompatible.php


goto http://php.net/manual/en/function.call-user-func.php
scroll down to user comment by
chris at NOSPAM dot panospheric dot com
23-Sep-2007 02:37

this looks like what you are trying to do?

hope it helps

Close but it's not quite it. The problem am having is more when I declare the dynamic function then when I call it.

Ultimately what I would like to do is something like this :

$code = 'print ($f->msg);';
$f->bar = function () use($f) { $code };

So the code of the function to be would be contain is $code as a string. But of course this returns an error...

[Kiopa_Matt]

Then use: $response = exec($code);

And what's the reason for you complicating shit beyond belief?

[qw12er]

Originally Posted by RDFrame

Then use: $response = exec($code);

And what's the reason for you complicating shit beyond belief?

LOL it's complicated I'll give you that! but in my application users can inject their own code into my predefined objects. Lets say for overriding a behavior that doesn't fit their business rules ...

thanks for your help.

[2012]

that's a tuffy ...

[qw12er]

Here we go !
Thanks everyone for your help !

class foo{
  public $msg;

  public function __call($method, $args){ 
   if(isset($this->$method)){
      $func = $this->$method;
      call_user_func_array($func, $args);
    }
  }

  public function create(){
$method = 'bar';
$this->msg = 'hello';
$parameters = '$param1, $param2';
$param1 = 'William';
$param2 = 'Phorrend';
$code = 'print ($obj->msg." $param1 $param2");';
    $obj = $this;
    $fctStr = "return function($parameters) use(\$obj) { $code };";
    
    $this->$method = eval($fctStr);
    $this->$method($param1, $param2);
  }
}

$foo = new foo();
$foo->create();