Is it the same?

[killboy]

Is it the same

if (!isset($var))   //code

and

if ($var==null)   //code

?????Just wanna know to avoid redundancy in my scripts.Thanks.

[justsomeguy]

Those aren't technically the same thing, but isset will return false if the variable is set to null.

[killboy]

So, I could just write

if (!isset($var))   //code

Instead

if (!isset($var) || $var==null)   //code

and it would be the same, right?

[justsomeguy]

Yeah, you wouldn't need both of them. If the variable is null then isset will return false.

[killboy]

OK, then. That was the kind of redundancy I was trying to avoid.Thanks.

[teng84]

isset(var) check if set so if var is equal to 0 its trueempty(var) if var is equal to 0 zero truevar = null null means 0 or empty so i think isset is enough but if you want to accept 0 values use empty