将SQL值存储为PHP变量(“mysqli_result类的对象不能转换为int”)

At the moment, I'm trying to store a value from a MySQL table as a variable in PHP, so running some basic tests to make sure that I can access the variable. I've managed to store the varaible, which will either be a 1 or a 0 (1 = server is up and running, 0 = server down).At the moment, I'm trying to store a value from