是否有一个函数在0或其他东西上返回false但在false，null，empty array（）上返回true？

I think the simplest way would be (!$var and $var!=0), but is there a way to do it without repeating the var name?

function foo($var)
{
    return ($var === false || $var === null || is_array($var));
}

if(foo($your_var)){}

After reading your comment, I think this is what you want:

function really_empty($var) {
    return $var !== 0 && empty($var);
}

$var !== 0 satisfies your requests, it returns false on zero and true on everything else (including false, null and empty arrays).