hack.php

<?php

$array = function() {
	$elements = func_get_args();

	$result = fn(function($i) use ($elements) {
		return $elements[$i];
	});

	$result->len = function() use ($elements) {
		return count($elements);
	};

	$result->each = function($fn) use ($elements) {
		foreach ($elements as $e)
			$fn($e);
	};

	return $result;
};

$a = $array('yabba', 'dabba', 'doo');

echo "1st element: ".$a(0)."\n";
echo "length: ".$a->len()."\n";

$a->each(function($e) {
	echo " - $e\n";
});



// PHP doesn't let you set properties on a Closure object
// .. this is a decorator that allows you to. >:-)
class Fn
{
	private $_data;

	function __construct($fn)
	{
		$this->_fn = $fn;
	}

	function __invoke()
	{
		$args = func_get_args();
		return call_user_func_array($this->_fn, $args);
	}

	function __call($name, $args)
	{
		return call_user_func_array($this->$name, $args);
	}

	function __get($name)
	{
		return $this->_data[$name];
	}

	function __set($name, $val)
	{
		return $this->_data[$name] = $val;
	}
}

function fn($fn) { return new Fn($fn); };