Merge branch '1.x'

src/Monolog/Handler/NewRelicHandler.php

@@ -12,6 +12,7 @@
 namespace Monolog\Handler;
 
 use Monolog\Logger;
+use Monolog\Utils;
 use Monolog\Formatter\NormalizerFormatter;
 use Monolog\Formatter\FormatterInterface;
 
@@ -182,7 +183,7 @@ class NewRelicHandler extends AbstractProcessingHandler
         if (null === $value || is_scalar($value)) {
             newrelic_add_custom_parameter($key, $value);
         } else {
-            newrelic_add_custom_parameter($key, @json_encode($value));
+            newrelic_add_custom_parameter($key, Utils::jsonEncode($value, null, true));
         }
     }