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psalm/docs/running_psalm/checking_non_php_files.md
Oliver Hader e457a7d5af
[FEATURE] Allow plugins to declare their custom scanner or analyzer (#5883)
* [FEATURE] Allow plugins to declare their custom scanner or analyzer

Related: #5882

* [TEST] Check plugin declaring own scanner/analyzer

* [TASK] Document plugins declaring scanner or analyzer

* [TEST] Clean up code

* [!!!][TASK] Extend Psalm\Plugin\RegistrationInterface

* add method `addFileTypeScanner(string $fileExtension, string $className): void`
* add method `addFileTypeAnalyzer(string $fileExtension, string $className): void`

* [TASK] Ignore IntelliJ/PhpStorm workspace folder in VCS

* [TASK] Remove superfluous class import
2021-06-04 15:32:53 -04:00

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Markdown

# 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).
## Using `psalm.xml`
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>
```
## Using custom plugin
Plugins can register their own custom scanner and analyzer implementations for particular file extensions.
```php
<?php
namespace Psalm\Example;
use Psalm\Plugin\PluginEntryPointInterface;
use Psalm\Plugin\RegistrationInterface;
class CustomPlugin implements PluginEntryPointInterface
{
public function __invoke(RegistrationInterface $registration, ?\SimpleXMLElement $config = null): void
{
$registration->addFileTypeScanner('phpt', TemplateScanner::class);
$registration->addFileTypeAnalyzer('phpt', TemplateAnalyzer::class);
}
}
```