diff --git a/src/MD_STD_IN.php b/src/MD_STD_IN.php
index 43556d1..0adfe86 100644
--- a/src/MD_STD_IN.php
+++ b/src/MD_STD_IN.php
@@ -131,6 +131,20 @@ final class MD_STD_IN {
 
     }
 
+    /**
+     * Converts an input value into a bool. Different from the default PHP way,
+     * the strings "false" and "False" are treated as negative.
+     *
+     * @param mixed $inputs Input data.
+     *
+     * @return boolean
+     */
+    public static function boolval(mixed $inputs):bool {
+
+        if (is_string($inputs) && (strtolower($inputs) === "false")) return false;
+        return (bool)$inputs;
+    }
+
     /**
      * Validates an input array for all entries being strings. Unsets empty values.
      * This is especially useful for parsed JSON.