Merge pull request #3626 from michalsn/fix/cast_null

Cast null value to string
codeigniter4 · Sep 10, 2020 · f9613ad · f9613ad
2 parents 41571e1 + 7d23fb3
commit f9613ad
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/system/HTTP/Request.php b/system/HTTP/Request.php
@@ -236,7 +236,7 @@ public function getIPAddress(): string
 	 */
 	public function isValidIP(string $ip = null, string $which = null): bool
 	{
-		switch (strtolower($which))
+		switch (strtolower((string) $which))
 		{
 			case 'ipv4':
 				$which = FILTER_FLAG_IPV4;