Change how Redis errors such as -ERR replies generates exceptions.

The "throw_errors" connection parameter has been removed and replaced by the
new "exceptions" client option since exceptions on -ERR replies returned by
Redis are not generated by connection classes anymore but are thrown by the
client class and other abstractions such as pipeline contexts.

This change does not affect much people using the Predis\Client class (aside
from the different configuration) but gives much more flexibility to those
building their own pieces of code around the internal classes of Predis.

lib/Predis/Connection/WebdisConnection.php

@@ -15,7 +15,6 @@ use Predis\Command\CommandInterface;
 use Predis\ResponseObjectInterface;
 use Predis\ConnectionParametersInterface;
 use Predis\ResponseError;
-use Predis\ServerException;
 use Predis\NotSupportedException;
 use Predis\Protocol\ProtocolException;
 use Predis\Connection\ConnectionException;
@@ -39,7 +38,6 @@ use Predis\Connection\ConnectionException;
  *  - timeout: timeout to perform the connection.
  *  - user: username for authentication.
  *  - pass: password for authentication.
- *  - throw_errors: -ERR replies treated as exceptions.
  *
  * @link http://webd.is
  * @link http://github.com/nicolasff/webdis
@@ -140,7 +138,7 @@ class WebdisConnection implements SingleConnectionInterface
         $reader = phpiredis_reader_create();
 
         phpiredis_reader_set_status_handler($reader, $this->getStatusHandler());
-        phpiredis_reader_set_error_handler($reader, $this->getErrorHandler($parameters->throw_errors));
+        phpiredis_reader_set_error_handler($reader, $this->getErrorHandler());
 
         return $reader;
     }
@@ -160,17 +158,10 @@ class WebdisConnection implements SingleConnectionInterface
     /**
      * Gets the handler used by the protocol reader to handle Redis errors.
      *
-     * @param Boolean $throwErrors Specify if Redis errors throw exceptions.
      * @return \Closure
      */
-    protected function getErrorHandler($throwErrors)
+    protected function getErrorHandler()
     {
-        if ($throwErrors) {
-            return function($errorMessage) {
-                throw new ServerException($errorMessage);
-            };
-        }
-
         return function($errorMessage) {
             return new ResponseError($errorMessage);
         };