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psalm/docs/running_psalm/checking_non_php_files.md

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2018-02-18 01:53:17 +01:00
# Checking non-PHP files
Psalm supports the ability to check various PHPish files by extending the `FileChecker` class. For example, if you have a template where the variables are set elsewhere, Psalm can scrape those variables and check the template with those variables pre-populated.
An example TemplateChecker is provided [here](https://github.com/vimeo/psalm/blob/master/examples/TemplateChecker.php).
To ensure your custom `FileChecker` is used, you must update the Psalm `fileExtensions` config in psalm.xml:
```xml
<fileExtensions>
<extension name=".php" />
<extension name=".phpt" checker="path/to/TemplateChecker.php" />
</fileExtensions>
```