diff --git a/lib/Cake/Controller/Component/RequestHandlerComponent.php b/lib/Cake/Controller/Component/RequestHandlerComponent.php
index 1915b981a..513af4029 100644
--- a/lib/Cake/Controller/Component/RequestHandlerComponent.php
+++ b/lib/Cake/Controller/Component/RequestHandlerComponent.php
@@ -531,7 +531,7 @@ class RequestHandlerComponent extends Component {
 			return false;
 		}
 
-		list($contentType) = explode(';', env('CONTENT_TYPE'));
+		list($contentType) = explode(';', env('CONTENT_TYPE') ?? '');
 		if ($contentType === '') {
 			list($contentType) = explode(';', CakeRequest::header('CONTENT_TYPE'));
 		}
diff --git a/lib/Cake/basics.php b/lib/Cake/basics.php
index 10d965c1c..0e9f13956 100644
--- a/lib/Cake/basics.php
+++ b/lib/Cake/basics.php
@@ -323,7 +323,7 @@ if (!function_exists('env')) {
 			if (isset($_SERVER['HTTPS'])) {
 				return (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off');
 			}
-			return (strpos(env('SCRIPT_URI'), 'https://') === 0);
+			return (strpos(env('SCRIPT_URI') ?? '', 'https://') === 0);
 		}
 
 		if ($key === 'SCRIPT_NAME') {