Stupid simple math plugin. {{ math:calc formula="1 + 1" }}

pi.math.php

<?php
class Plugin_Math extends Plugin {

  var $meta = array(
		'name'       => 'Math',
		'version'    => '0.1',
		'author'     => 'Philip Meissner of Creative Loupe',
		'author_url' => 'http://lou.pe'
	);

	public function calc()
	{
		$formula = $this->fetchParam('formula', 0);

		html_entity_decode($formula);

		@eval("\$result = $formula;");

		return $result;
	}
}
?>