使用其他功能运行功能

How can I make this work, I dont know why it's not working

public function generateCourse($course, $type) {
    $this->runFunction($this->generateHole($hole), $type);
}

public function runFunction($function, $type) {
        switch ($type){
            case 0:
                for ($hole = 0; $hole < 18; $hole++) {
                    $function;
                }
                break;

Try this

public function runFunction($function, $type) {
        switch ($type){
            case 0:
                for ($hole = 0; $hole < 18; $hole++) {
                    $function();
                }

or call the function with this

call_user_func($function);