gistfile1.php

<?php
error_reporting(E_ALL);

$options['storage']['registry'] = 1;

if (isset($options['storage']) &&
    isset($options['storage']['registry']) &&
    isset($options['storage']['registry']['key']))
{
    echo "WTF";
}

gistfile2.txt

<?php

    /**
     * Stores navigation container in the registry
     *
     * @return void
     */
    protected function _storeRegistry()
    {
        $options = $this->getOptions();
        if(isset($options['storage']) &&
           isset($options['storage']['registry']) &&
           isset($options['storage']['registry']['key']))
        {
           $key = $options['storage']['registry']['key'];
        } else {
            $key = self::DEFAULT_REGISTRY_KEY;
        }

        Zend_Registry::set($key,$this->getContainer());
    }