Switch back to getenv() for reading Platform.sh values, as it's the only option that is populated when running in the PHP built in web server.

Author: Crell

platformsh-flex-env.php

@@ -42,8 +42,8 @@ function mapPlatformShDatabase() : void
 
     // Set the DATABASE_URL for Doctrine, if necessary.
     # "mysql://[email protected]:3306/symfony?charset=utf8mb4&serverVersion=5.7";
-    if (isset($_SERVER['PLATFORM_RELATIONSHIPS'])) {
-        $relationships = json_decode(base64_decode($_SERVER['PLATFORM_RELATIONSHIPS']), true);
+    if (getenv('PLATFORM_RELATIONSHIPS')) {
+        $relationships = json_decode(base64_decode(getenv('PLATFORM_RELATIONSHIPS'), true));
         foreach ($relationships[$dbRelationshipName] as $endpoint) {
             if (empty($endpoint['query']['is_master'])) {
                 continue;