class Counter { public static $count = 0; public static function setValue($value) { self::$count = $value; } } Counter::setValue(10); // sets the static variable to 10 echo Counter::$count; // outputs 10In this example, we create a Counter class that has a static variable called "$count" that starts at 0. We then use the static setValue function to set the value of the static variable to 10. Finally, we output the value of the static variable using the syntax ClassName::$staticVariable. It is difficult to determine the package or library used in this example without more information. However, it is possible that the Counter class is part of a larger library or framework that includes other classes and functions for creating and manipulating counters.