feat(ffe): PHP FFE implementation

.github/CODEOWNERS

@@ -14,6 +14,11 @@ compile_rust.sh @Datadog/libdatadog-apm
 # APM IDM Team
 /src/ @DataDog/apm-idm-php
 
+# FFE (Feature Flagging & Experimentation) SDK Team
+/src/DDTrace/FeatureFlags/ @DataDog/feature-flagging-and-experimentation-sdk
+/src/DDTrace/OpenFeature/ @DataDog/feature-flagging-and-experimentation-sdk
+/tests/FeatureFlags/ @DataDog/feature-flagging-and-experimentation-sdk
+
 # Release files
 Cargo.lock @DataDog/apm-php @DataDog/profiling-php @Datadog/libdatadog-apm
 package.xml @DataDog/apm-php @DataDog/profiling-php @Datadog/asm-php

.gitlab/generate-tracer.php

@@ -386,6 +386,26 @@ function before_script_steps($with_docker_auth = false) {
     - make test_unit PHPUNIT_JUNIT="artifacts/tests/php-tests.xml" <?= ASSERT_NO_MEMLEAKS ?>
 <?php after_script(); ?>
 
+<?php if (version_compare($major_minor, "8.0", ">=")): ?>
+"Feature flags tests: [<?= $major_minor ?>]":
+  extends: .debug_test
+  needs:
+    - job: "compile extension: debug"
+      parallel:
+        matrix:
+          - PHP_MAJOR_MINOR: "<?= $major_minor ?>"
+            ARCH: "amd64"
+      artifacts: true
+    - job: "Prepare code"
+      artifacts: true
+  variables:
+    PHP_MAJOR_MINOR: "<?= $major_minor ?>"
+    ARCH: "amd64"
+  script:
+    - make test_featureflags PHPUNIT_JUNIT="artifacts/tests/php-tests.xml" <?= ASSERT_NO_MEMLEAKS ?>
+<?php after_script(); ?>
+<?php endif; ?>
+
 "API unit tests: [<?= $major_minor ?>]":
   extends: .debug_test
   needs: