How can I create a function dynamically?

Question

I have a variable like $string = "blah";

How can I create a function that has the variable value as name? Is this possible in PHP?

Like function $string($args){ ... } or something, and be able to call it like:

blah($args);

Answer 1

this might not be a good idea, but you can do something like this:

$string = "blah";
$args = "args"
$string = 'function ' . $string . "({$args}) { ... }";
eval($string);

Answer 2

That doesn't sound like a great design choice, it might be worth rethinking it, but...

If you're using PHP 5.3 you could use an anonymous function.

<?php
$functionName = "doStuff";
$$functionName = function($args) {
    // Do stuff
};

$args = array();
$doStuff($args);
?>