twig で 独自フィルターを追加

自分用メモ

TwigCustomFilter.php

<?php

class TwigCustomFilter {
    private $customFilterList = [
        'ord' => 'twig_ord'
    ];
    public function getCustomFilterList() {
        return $this->customFilterList;
    }

    public function twig_ord($input) {
        if (!empty($input)) {
            return ord($input);
        } else {
            return 0;
        }
    }
}

        Twig_Autoloader::register();
        $loader = new Twig_Loader_Filesystem($templateDir);

        $twig = new Twig_Environment($loader, []);

        $twigCustomFilter = new TwigCustomFilter();
        $customFilterList = $twigCustomFilter->getCustomFilterList();
        foreach ($customFilterList as $filterName => $functionName) {
            $filter = new Twig_SimpleFilter($filterName, [$twigCustomFilter, $functionName]);
            $twig->addFilter($filter);
        }
        $template = $twig->loadTemplate($templateFileName);
        $template->display($model->getValues());