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docs(feature-flag): add documentation for php feature flags #15443

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bb853cf
add documentation for php feature flags
Litarnus Nov 10, 2025
7314633
version fix
Litarnus Nov 10, 2025
05b9c1c
fix namespace
Litarnus Nov 10, 2025
e6d7049
Merge branch 'master' into php-feature-flags
Litarnus Nov 10, 2025
42f0e7b
add count
Litarnus Nov 11, 2025
592b238
update url to point to Sentry SDK explainer
Litarnus Nov 18, 2025
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14 changes: 14 additions & 0 deletions docs/platforms/php/common/feature-flags/index.mdx
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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 `4.18.0` or above.

## Enable Evaluation Tracking

<PlatformContent includePath="feature-flags/evaluation-tracking-index" />
10 changes: 10 additions & 0 deletions 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.**
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@cleptric cleptric Nov 10, 2025

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We might want to call out how many feature flags you can set.


```php
\Sentry\addFeatureFlag('test-flag', false);

captureException(new \RuntimeException("Something went wrong!"));
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@sentry sentry bot Nov 10, 2025

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Bug: The PHP example calls captureException() without a namespace or use statement, leading to a fatal error if copied directly.
Severity: CRITICAL | Confidence: 0.95

🔍 Detailed Analysis

The PHP example for feature flags calls captureException() without a namespace prefix or a use statement. If a user copies this code into a PHP environment without use function Sentry\captureException;, it will result in a Fatal Error: Call to undefined function captureException(), causing the application to terminate.

💡 Suggested Fix

Prefix captureException() with the \Sentry\ namespace, changing captureException(new \RuntimeException("Something went wrong!")); to \Sentry\captureException(new \RuntimeException("Something went wrong!")); for consistency with other examples.

🤖 Prompt for AI Agent 
Review the code at the location below. A potential bug has been identified by an AI
agent.
Verify if this is a real issue. If it is, propose a fix; if not, explain why it's not
valid.

Location: platform-includes/feature-flags/evaluation-tracking-index/php.mdx#L7

Potential issue: The PHP example for feature flags calls `captureException()` without a
namespace prefix or a `use` statement. If a user copies this code into a PHP environment
without `use function Sentry\captureException;`, it will result in a Fatal Error: Call
to undefined function `captureException()`, causing the application to terminate.

Did we get this right? 👍 / 👎 to inform future reviews.

```

Go to your Sentry project and confirm that your error event has recorded the feature flag "test-flag" and its value "false".
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