public function include_header( $h, $h_data )
{
    // Require header file
    if (isset($h) && !empty($h)) {
        $this->header_file = 'includes/header/'.$h;
    } else {
        return false;
    }
    
    // Pass optional array of parameters
    if (isset($h_data) && is_array($h_data) && !empty($h_data)) {
        // Loop through array & assign keys to appropriate class members
        foreach($h_data as $key => $val) {      
            if ($key == 'doctype') {
                $this->doctype = $val;
            }
            if ($key == 'title') {
                $this->title = $val;
            }
            if ($key == 'meta') {
                // The meta key is should be an array in h_data
                // so, we'll have to loop through the meta array
                // in order to parse the individual meta elements.
                foreach ($key as $meta_key => $meta_val) {
                    $this->error = $meta_key;
                }   
            }
        }
    } else {
        return false;
    }
}

I'm trying to loop through a multidimensional array, where I have the following variable...

$h_data['meta']['individual_element']

I'm trying to loop through the 'meta', so I can access each individual value, but I'm having trouble.