AutoEscape.php

<?php

class Vendor_View_Helper_AutoEscape
{
    protected $_unescapedVars = null;
    protected $_view;

    public function setView(Zend_View_Interface $view)
    {
        $this->_view = $view;
    }

    public function autoEscape()
    {
        if ($this->_unescapedVars === null) {
            $vars = $this->_view->getVars();
            $this->_unescapedVars = $vars;
            foreach ($vars as $k => $v) {
                $this->_view->$k = $this->escapeDeep($v);
            }   
        } else {
            $this->_view->assign($this->_unescapedVars);
            $this->_unescapedVars = null;
        }
    }

    /**
     * Escapes strings and recursively iterates over arrays to escape all entries.
     *
     * @param mixed $original
     * @return mixed
     */
    protected function escapeDeep(&$original) {
        if (is_string($original))
            return $this->_view->escape($original);
        elseif (is_array($original)) {
            foreach ($original as $k => $v) {
                $original[$k] = $this->escapeDeep($v);
            }
        }
        return $original;
    }
}