How to Upgrade Twig from Underscored to Namespaces
Symfony recently announced a new version of Twig with namespaces as we know it. Before PHP 5.2 there was Underscored_Namespace - I remember because that was the first version I used.
Today I'll show you how to upgrade from _ to \\ in few minutes seconds.
This set would not be possible and as good as it is without you, open-source PHP community. I'd like to thank 👏:
- greg0ire for contributing to this set
- and enumag for battle testing and reported issues
Find and Replace?
So all we need to do is replace Twig_ with Twig\?
-Twig_Function
+Twig\FunctionThis would fail since Twig\Function class doesn't exist. Twig\TwigFunction does. There 150 more cases where find and replace fails.
2 Places
We need to replace both docblocks:
/**
- * @throws \Twig_Error_Loader
+ * @throws \Twig\Error\LoaderError
*/
public function render(): void
{
- /** @var \Twig_Environment $env */
+ /** @var \Twig\Environment $env */
$env = $this->getTwigEnv();
// ...
}And the code:
-$safeTwigEnvironment = new \Twig_Environment(
+$safeTwigEnvironment = new \Twig\Environment(
- new \Twig_Loader_Array([])
+ new \Twig\Loader\ArrayLoader([])
);In a reaction to the Symfony blog post, I see many developers do upgrades manually. In case of 50 changes, it's ok, but private code bases will go 1000+ use cases.
Code Pattern Refactoring
For Rector it just 1 pattern to refactor. Just tell him to process your files src:
composer require rector/rector --dev # make sure you have version 0.4.10+ at least
vendor/bin/rector process src --set twig-underscore-to-namespaceHappy coding!