code cleaning

src/Illuminate/Database/Connectors/ConnectionFactory.php

@@ -11,6 +11,7 @@
 use Illuminate\Database\PostgresConnection;
 use Illuminate\Database\SqlServerConnection;
 use Illuminate\Contracts\Container\Container;
+use Illuminate\Contracts\Debug\ExceptionHandler;
 
 class ConnectionFactory
 {
@@ -113,30 +114,24 @@ protected function createPdoResolver(array $config)
     protected function createPdoResolverWithHosts(array $config)
     {
         return function () use ($config) {
-            if (! is_array($config['host'])) {
-                $hosts = [$config['host']];
-            } else {
-                $hosts = $config['host'];
-                shuffle($hosts);
+            $hosts = is_array($config['host']) ? $config['host'] : [$config['host']];
+
+            if (empty($hosts)) {
+                throw new InvalidArgumentException('Database hosts array is empty.');
             }
 
-            $lastHost = end($hosts);
-            foreach ($hosts as $host) {
+            foreach (Arr::shuffle($hosts) as $key => $host) {
                 $config['host'] = $host;
 
                 try {
                     return $this->createConnector($config)->connect($config);
                 } catch (PDOException $e) {
-	                if ($host !== $lastHost) {
-	                    $this->container->make('Illuminate\Contracts\Debug\ExceptionHandler')->report($e);
+	                if (count($hosts) - 1 === $key) {
+	                    $this->container->make(ExceptionHandler::class)->report($e);
                     }
                 }
             }
 
-            if (empty($hosts)) {
-                throw new InvalidArgumentException('Database hosts array cannot be empty');
-            }
-
             throw $e;
         };
     }

src/Illuminate/Support/Arr.php

@@ -457,6 +457,19 @@ public static function set(&$array, $key, $value)
         return $array;
     }
 
+    /**
+     * Shuffle the given array and return the result.
+     *
+     * @param  array  $array
+     * @return array
+     */
+    public static function shuffle($array)
+    {
+        shuffle($array);
+
+        return $array;
+    }
+
     /**
      * Sort the array using the given callback or "dot" notation.
      *