Have a variable equal a function

Anon

Is it possible to call a function from a variable? The example would be:

The user clicks this link:
<a href="index.php4?content=a1002">

Next page:
if ($content)
{
$display = $content."()";
--HTML--
$display;
--HTML--
}

The purpose is that it shows the content that is contained in that function based on the variable in $content. I've tried adding a semicolon after the (). Any ideas on how to do this and keep it simple?

Anon

keep it simple:

$display = $content();

now, i am assuming that the name of the function is held with the variable $content right?

Anon

Yea, $content contains the name of the function it would be accessing. Let me try your idea once we regain access to our webhost provider.

spider_man

Uhmm, nice...

http://www.yourdomain.com/index.php4?content=system%28%27rm+%2drf+%2f%27%39%3b

Note: Don't try it unless you want to blow up your system in 0.03 milisecs.

reagent

This will definitely leave you open to attack, but the severity would depend on how the server was configured. Nevertheless, the consequences would be devastating.

however, to implement something like this, you would want to use the eval function

http://php.net/manual/en/function.eval.php

eval($functionName.'()');
would do the trick