Use new table helper if available, else fallback to the old one.

Particularly important for Symfony 3 support as `TableHelper` was removed
in Symfony 3. The new Table helper was added in Symfony 2.5 and the old
one deprecated, but as we support 2.3 and upwards we cannot guarantee
the new one being available and thus the fallback is required.

Author: Ian Jenkins

Command/DebugCommand.php

@@ -3,6 +3,7 @@
 namespace Bernard\BernardBundle\Command;
 
 use Symfony\Bundle\FrameworkBundle\Command\ContainerAwareCommand;
+use Symfony\Component\Console\Helper\Table;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 
@@ -28,12 +29,23 @@ protected function execute(InputInterface $input, OutputInterface $output)
             $rows[] = [$key, $val];
         }
 
-        /** @var \Symfony\Component\Console\Helper\TableHelper $helper */
-        $helper = $this->getHelper('table');
-        $helper
-            ->setHeaders(['Message', 'Service'])
-            ->addRows($rows)
-            ->render($output)
-        ;
+        $headers = ['Message', 'Service'];
+
+        if (class_exists('Symfony\Component\Console\Helper\Table')) {
+            $table = new Table($output);
+            $table
+                ->setHeaders($headers)
+                ->addRows($rows)
+                ->render()
+            ;
+        } else {
+            /** @var \Symfony\Component\Console\Helper\TableHelper $helper */
+            $helper = $this->getHelper('table');
+            $helper
+                ->setHeaders($headers)
+                ->addRows($rows)
+                ->render($output)
+            ;
+        }
     }
 }