Re: how to pass true/false or "no argument"

another approach: func_num_args(). http://www.php.net/manual/en/function.func-num-args.php ----- Original Message ----- From: "Henrik Hudson" <lists@rhavenn.net> To: "John A. Grant" <jazrant@zsc.nrcan.zc.ca>; <php-general@lists.php.net> Sent: Monday, October 29, 2001 9:06 PM Subject: Re: [PHP] how to pass true/false or "no argument" > If $xxx isn't defined at all, its default is NULL, so your if statement > should work as is. If $xxx is not defined, then you should get thrown down to > the else. There is a difference between false and NULL. > > On Monday 29 October 2001 10:50, John A. Grant wrote: > > I've written several functions with optional "string" parameters. > > They work fine. But I've never written one that accepts an optional > > "bool" parameter and I'm now confused. > > > > I would like to have this: > > somefunction("hello"); > > somefunction("hello",false); > > somefunction("hello",true); > > > > function somefunction($text,$xxx="") > > { > > if($xxx){ > > $xxx parameter was passed as true or false > > }else{ > > $xxx parameter was not passed > > } > > } > > > > Which is correct for the default initialization of $xxx: > > $xxx=false; > > $xxx=null; > > $xxx=""; > > > > How do I distinguish between false and "$xxx parameter not > > passed"? Do I use isset()? Do I use ===? > > > > Thanks. > > -- > > Henrik Hudson > lists@rhavenn.net > > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: php-general-unsubscribe@lists.php.net > For additional commands, e-mail: php-general-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net >