From eda0430c939b507e98340f4e04e2f08e71264654 Mon Sep 17 00:00:00 2001
From: Oleg Kasyanov <oleg@batumi.org>
Date: Sat, 20 Jan 2024 12:11:47 +0400
Subject: [PATCH] Improved comparison of the condition

---
 src/Http/IpAndUserAgentMiddleware.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Http/IpAndUserAgentMiddleware.php b/src/Http/IpAndUserAgentMiddleware.php
index 6242984..6514149 100644
--- a/src/Http/IpAndUserAgentMiddleware.php
+++ b/src/Http/IpAndUserAgentMiddleware.php
@@ -61,7 +61,11 @@ public function determineIpViaProxyAddress(ServerRequestInterface $request): ?st
         foreach ($this->headersToInspect as $header) {
             if (
                 $request->hasHeader($header)
-                && preg_match_all('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s', $request->getHeaderLine($header), $vars)
+                && preg_match_all(
+                    '#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s',
+                    $request->getHeaderLine($header),
+                    $vars
+                ) !== false
                 && null !== ($ip = $this->extractIp($request, $vars))
             ) {
                 return $ip;