从PHP渲染Twig宏？

Question

I'm currently migrating a project from an old custom XML-based templating engine to Twig . In order to ease the transition I thought it might be nice to be able to render Twig macros from inside the old engine so that new widgets can be built using Twig and be ran in both places as needed.

The only way I can think of doing it is to generate some Twig source code that looks like this:

{% import 'macros.twig' as m %}
{{ m.widget(...) }}

And then do something crazy like

eval('?>'.$twig->compileSource($twig->getLoader()->getSource($name), $name));

Which seems slow, dangerous, and brittle. Is there a better way to tap into the Twig API?

Answer 1

Yes, to render a template, you should use:

echo $twig->loadTemplate($name)->render($context);

The loadTemplate will compile the twig source if it does not exist in cache.

The render method will render your template safely.

A macro is basically a method of the compiled class (see the compiled template link of this fiddle: http://twigfiddle.com/orfp3d ) you can call a macro from outside quite easily, but that's not recommended (as your macro will not take part of the TemplateInterface )