Php：变量中的concat常量

Question

class MyClass
{
    const EVENT_NAME='Name of the event';

    const EVENT_DATE='xx/xx/xxxx';

    public $eventName = self::EVENT_NAME.' '.self::EVENT_DATE;
}

不起作用！ 我想在变量中连接2个常量。

Answer 1

class MyClass
{
    const EVENT_NAME='Name of the event';

    const EVENT_DATE='xx/xx/xxxx';

    public function __construct() {
        $this->eventName = self::EVENT_NAME.' '.self::EVENT_DATE;
    }

    public $eventName;
}