Tips for Creating Your First Rector Rule to Transform PHP Code

Tips for Creating Your First Rector Rule to Transform PHP Code

Rector is a reconstructor tool for PHP. Learn how you can use it to code with modern PHP features yet still deploy to legacy environments. In this article, I’ll share a few tips for creating rules in Rector.

Rector is a reconstructor tool for PHP. Learn how you can use it to code with modern PHP features yet still deploy to legacy environments.

Rector is a reconstructor tool for PHP. It takes source code and transformation rules as inputs and modifies the code according to the rules as output.

Even if we don’t think about it, we often use tooling to transform PHP code. For instance, PHP CodeSniffer can validate whether the code abides by PSR standards and, when it doesn’t, executing the phpcbf command can automatically fix it. Or PHP-Scoper will scope the dependencies in the project to avoid potential conflicts.

Rector is different from these tools in that it is a meta application. It doesn’t have a predetermined objective, such as fixing styles or scoping the project. Instead, it will transform the code following rules, for whichever rules it is given. Then, Rector can perfectly reproduce PHP CodeSniffer, PHP-Scoper, or any other code transformation tool.

In this article, I’ll share a few tips for creating rules in Rector.

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