Use debug to handle errors with PHP 5

ogizanagi · ogizanagi · commit 1cf2545fa50e · 2016-12-07T20:58:55.000+01:00
diff --git a/src/Symfony/Component/Console/Application.php b/src/Symfony/Component/Console/Application.php
@@ -36,6 +36,8 @@
 use Symfony\Component\Console\Event\ConsoleTerminateEvent;
 use Symfony\Component\Console\Exception\CommandNotFoundException;
 use Symfony\Component\Console\Exception\LogicException;
+use Symfony\Component\Debug\Debug;
+use Symfony\Component\Debug\ErrorHandler;
 use Symfony\Component\Debug\Exception\FatalThrowableError;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
@@ -120,6 +122,21 @@ public function run(InputInterface $input = null, OutputInterface $output = null
         $this->configureIO($input, $output);
 
         try {
+            if (PHP_MAJOR_VERSION < 7 && $this->catchErrors) {
+                Debug::enable();
+                $handler = set_exception_handler('var_dump');
+                $handler = is_array($handler) ? $handler[0] : null;
+                restore_exception_handler();
+
+                if (!$handler instanceof ErrorHandler) {
+                    throw new \RuntimeException(sprintf('Expected instance of "%s". Got "%s".', ErrorHandler::class, get_class($handler)));
+                }
+
+                $handler->setExceptionHandler(function ($e) use ($output) {
+                    $this->renderThrowable($e, $output);
+                });
+            }
+
             $exitCode = $this->doRun($input, $output);
         } catch (\Exception $e) {
             if (!$this->catchExceptions) {
@@ -291,6 +308,10 @@ public function areErrorsCaught()
      */
     public function setCatchErrors($boolean)
     {
+        if (PHP_VERSION_ID < 70000 && $this->catchErrors && !class_exists(Debug::class)) {
+            throw new \LogicException('The "symfony/debug" component is required for using "catchErrors" along with php < 7.');
+        }
+
         $this->catchErrors = (bool) $boolean;
     }
 
