php_parser.php
protected function invokeParser($content, $is_match)
    {
        if (($content === '') || ($content === false)) {
            return true;
        }
        $handler = $this->mode_handlers[$this->mode->getCurrent()];

        return $this->parser->$handler($content, $is_match);
    }
protected function invokeParser($content, $is_match)
    {
        if (($content === '') || ($content === false)) {
            return true;
        }
        $handler = $this->mode_handlers[$this->mode->getCurrent()];

        return $this->parser->$handler($content, $is_match);
    }
Calls the parser method named after the current mode.
Empty content will be ignored.
The lexer has a parser handler for each mode in the lexer.

@param string $content        Text parsed.
@param bool $is_match      Token is recognised rather than unparsed data.