Question

I am checking a variable using the following code to

if(!empty($var) && $var == 1)
{
       // do some thing
}
elseif(!empty($var) && $var == 0)
{
       // do some thing
}

But the elseif is not working
If I removed the !empty then its working fine.
what is the problem on that

Can any one explain these and also differences between isset and !empty

Answer 1

Please peruse the documentation on what PHP considers to be empty.

I’d rewrite your code as:

if (isset($var)) {
    if ($var == 1) {
        ...
    } else if ($var == 0) {
        ...
    } else {
        // if you're that specific you should handle any other case as well
    }
}