throw exception on publish workflow with buggy version of php

Author: dbu

DependencyInjection/CmfCoreExtension.php

@@ -344,6 +344,12 @@ public function setupFormTypes(ContainerBuilder $container, LoaderInterface $loa
      */
     private function loadPublishWorkflow($config, XmlFileLoader $loader, ContainerBuilder $container)
     {
+        // this check can be removed again for version 1.3+ as we increased the php version to 5.3.9
+        if (version_compare(PHP_VERSION, '5.3.7', 'lt')) {
+            // do not accept to work with bug in is_subclass_of
+            throw new InvalidConfigurationException('You can not use the publish workflow with PHP < 5.3.7');
+        }
+
         $container->setParameter($this->getAlias().'.publish_workflow.view_non_published_role', $config['view_non_published_role']);
         $loader->load('publish-workflow.xml');