[Resolved] If then statement

Jon12345

I want to say If navtype=subproduct and $filter has a value, then do this.

Is the code below correct?

if ($navtype=="subproduct") AND ($filter) {

halojoy

if ( $navtype=="subproduct" && $filter ) {

&& is used for AND
I guess you can use something else, too. But ...

Jon12345

Thats great thanks.

What about if I want to say:

If navtype=subproduct and $filter does NOT have a value

halojoy

// there are several options to test
// ! means NOT
if (!isset( $x )) // variable is not defined
if (!$x ) // is not set, or isset AND has zero value (empty string or 0 )
if (empty( $x )) //is somthing similiar

if ( $navtype=="subproduct" && !$filter )

// || is used for OR
if ( $navtype=="subproduct" || $filter )

There is a chapter at http://php.net about this, but link I do not know

Jon12345

I used !$variable. Thanks.