use strict checks for accessing service container through mc4wp() fun…

…ction
ibericode · Oct 3, 2023 · 2b35151 · 2b35151
1 parent 9bfc7fa
commit 2b35151
Showing 1 changed file with 4 additions and 5 deletions.
diff --git a/includes/functions.php b/includes/functions.php
@@ -13,19 +13,18 @@
  * @ignore
  * @access private
  *
- * @param string $service (optional)
+ * @param null|string $service (optional)
  * @return mixed
  *
  * @throws Exception when service is not found
  */
 function mc4wp( $service = null ) {
-	static $mc4wp;
-
-	if ( ! $mc4wp ) {
+	static $mc4wp = null;
+	if ( null === $mc4wp ) {
 		$mc4wp = new MC4WP_Container();
 	}
 
-	if ( $service ) {
+	if ( null !== $service ) {
 		return $mc4wp->get( $service );
 	}