dynamic function calls

[frepp]

Hello folks,

Does anyone know the correct syntax to call a classes' member function through a member variable? I know how to do this as a pure function as:

<?php
function foo()
{
echo "Hello World!";
}
$call = "foo";
$call(); // This calls foo();
?>

Here's my class implementation:
class foo
{
var $z;
var $ptr;

function foo($arg)
{
$this->z = 0;
$this->ptr = $arg;
}

function foo1
{
$this->ptr(); // How do I call foo2 through the member variable???

  // what ever ...

}
function foo2
{
// what ever ...
}
function foo3
{
// what ever ...
}

}

$test = new foo("foo2");
$test->foo1(); // I want foo1() to call foo2()....

Any help would be greatly appreciated!!

[Weedpacket]

Something like this, you mean?

You can also call an object's method by using the variable functions feature.

Example 12-13. Variable method example

<?php
class Foo
{
    function Var()
    {
        $name = 'Bar';
        $this->$name(); // This calls the Bar() method
    }

function Bar()
{
    echo "This is Bar";
}
}

$foo = new Foo();
$funcname = "Var";
$foo->$funcname();  // This calls $foo->Var()

?>

[frepp]

My requirement is that I be able to call the method/function inside of another class member function. If I try to do:

<?php
class Foo
{
var $name; // I live inside of the class
function foo()
{
$this->name = 'Bar';
}

function Bar()
{
    echo "This is Bar";
}

 function foofoo()
{
    [B]$this->$name(); // This does not work[/B]
   // Bar() is never called.
}

}

$test = new foo;
$test->foofoo();
?>

All I get back is:
Fatal error: Call to undefined function: ()

I'm using php version 4.1.2

Thanks in advance!

[Weedpacket]

Originally posted by frepp

function foofoo()
{
$this->$name(); // This does not work
// Bar() is never called.
}

Well, no, because in foofoo() the variable $name has no value (hence "undefined function ()").

What you're wanting to do is take the name property of the object (i.e., $this->name), and call the method ($this->Bar() as it happens) whose name matches that property's value. To put it another way: instead of using Bar to refer to the method directly, you want to use the value of $this->name instead.

In short,

$this->{$this->name}()