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+---
+title: Set Up Feature Flags
+sidebar_title: Feature Flags
+sidebar_order: 7000
+description: With Feature Flags, Sentry tracks feature flag evaluations in your application, keeps an audit log of feature flag changes, and reports any suspicious updates that may have caused an error.
+---
+
+## Prerequisites
+
+- [Sentry SDK](/) version `4.18.1` or above.
+
+## Enable Evaluation Tracking
+
+<PlatformContent includePath="feature-flags/evaluation-tracking-index" />
diff --git a/platform-includes/feature-flags/evaluation-tracking-index/php.mdx b/platform-includes/feature-flags/evaluation-tracking-index/php.mdx
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+### Generic API
+You can use the generic API to manually track feature flag evaluations. These evaluations are held in memory and are sent to Sentry on error and transaction events. **At the moment, we only support boolean flag evaluations.**
+
+Each event can record up to 100 feature flag evaluations; if more are sent, only the most recent 100 are kept.
+
+```php
+\Sentry\addFeatureFlag('test-flag', false);
+
+\Sentry\captureException(new \RuntimeException("Something went wrong!"));
+```
+
+Go to your Sentry project and confirm that your error event has recorded the feature flag "test-flag" and its value "false".