From ec3e0e3f907d25456063ec1e1799eb0bcf4a5bab Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Wed, 13 Nov 2019 10:47:25 +0100
Subject: [PATCH] set json flags correctly for SlackRecord, fixes #1396, closes
 #1397

---
 src/Monolog/Handler/Slack/SlackRecord.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/Monolog/Handler/Slack/SlackRecord.php b/src/Monolog/Handler/Slack/SlackRecord.php
index 2a8818d4f..39455501f 100644
--- a/src/Monolog/Handler/Slack/SlackRecord.php
+++ b/src/Monolog/Handler/Slack/SlackRecord.php
@@ -208,13 +208,17 @@ public function stringify($fields)
     {
         $normalized = $this->normalizerFormatter->format($fields);
         $prettyPrintFlag = defined('JSON_PRETTY_PRINT') ? JSON_PRETTY_PRINT : 128;
+        $flags = 0;
+        if (PHP_VERSION_ID >= 50400) {
+            $flags = JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE;
+        }
 
         $hasSecondDimension = count(array_filter($normalized, 'is_array'));
         $hasNonNumericKeys = !count(array_filter(array_keys($normalized), 'is_numeric'));
 
         return $hasSecondDimension || $hasNonNumericKeys
-            ? Utils::jsonEncode($normalized, $prettyPrintFlag)
-            : Utils::jsonEncode($normalized);
+            ? Utils::jsonEncode($normalized, $prettyPrintFlag | $flags)
+            : Utils::jsonEncode($normalized, $flags);
     }
 
     /**