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Example code of ez-php/feature-flags

Informations about the package feature-flags

ez-php/feature-flags

Simple feature flag evaluation for the ez-php framework. No external service required — flags are stored in a PHP file, a database table, or a plain array.

Installation

Register the provider in provider/modules.php:

Usage

Configuration

Add a config/flags.php to your application:

file must point outside config/. The framework loads every config/*.php as a config namespace, so a definitions file at config/flags.php would be this config file — the driver would then report driver and file as enabled flags and none of your real ones.

Drivers

Driver Config key value Description
file file Reads a PHP file returning array<string, bool>
database database Reads a feature_flags table via PDO
redis redis Reads feature_flags / feature_flags:contexts:<name> hashes via ext-redis
array array Empty in-memory driver (CI / test environments)

File driver

Create flags.php in your application root:

Database driver

Create the feature_flags table (example migration):

For per-context overrides (e.g. per-user beta rollouts), also create feature_flag_contexts:

When enabledFor('flag', $userId) is called, the driver checks feature_flag_contexts first; if no matching row exists, it falls back to the global feature_flags value. A missing feature_flag_contexts table is silently treated as "no overrides" — no migration is required for basic use.

Insert flags directly via SQL or through your own admin interface:

Redis driver

Same two-hash shape as the database driver's two tables:

enabledFor('beta-search', 42) checks the context hash first, then falls back to the global feature_flags hash when no override exists — identical precedence to the database driver.

Percentage rollouts

Release a flag to a stable slice of your users by adding rollouts to config/flags.php:

The bucket is crc32(flag . '|' . id) % 100, so a user stays in when you raise the percentage (10 → 25 only adds users) and different flags pick different slices. A rollout replaces the stored value for that flag; Flag::enabled('new-checkout') (no context) is only true at 100. Flags without a rollout behave as before.

Behaviour

Testing

Most tests run without external infrastructure (SQLite :memory: for the database driver, temp files for the file driver). RedisDriverTest requires a live Redis instance and is skipped automatically when ext-redis isn't loaded.

License

MIT

All versions of feature-flags with dependencies

PHP Build Version
Package Version
Requires php Version ^8.5
ez-php/contracts Version ^2.0
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