From b98f327aad9ecf8a720f271aa97ac2aecf596b25 Mon Sep 17 00:00:00 2001
From: Rumperuu <me+git@bengoldsworthy.net>
Date: Mon, 17 May 2021 12:55:49 +0100
Subject: [PATCH] fix: add null check

---
 src/includes/class-convert.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/includes/class-convert.php b/src/includes/class-convert.php
index 3393500..684851a 100644
--- a/src/includes/class-convert.php
+++ b/src/includes/class-convert.php
@@ -55,7 +55,9 @@ class Convert {
 	 * @since  1.0-beta
 	 * @todo  Replace with built-in type casting.
 	 */
-	public static function to_bool( string $value ): bool {
+	public static function to_bool( string|null $value ): bool {
+		if (!$value) return false;
+		
 		// Convert string to lower-case to make it easier.
 		$value = strtolower( $value );
 		// Check if string seems to contain a "true" value.