Rob, I'd go along with the setting a var to null issue (in the cases I have worked so far on, there has not been a need to set variables to null). However, what is wrong with is_null()? >From the php manual chm: >>>>> (PHP 4 >= 4.0.4, PHP 5) is_null -- Finds whether a variable is NULL Description bool is_null ( mixed var ) Finds whether the given variable is NULL. Parameters var The variable being evaluated. Return Values Returns TRUE if var is null, FALSE otherwise. <<<<< And to be very pedantic - as null does not have a type then actually 'x === null' should evaluate to absurdity, but PHP is more pragmatic than that ;-) Cheers - AJ Alexander J Turner Ph.D. www.deployview.com www.nerds-central.blogspot.com www.project-network.com -----Original Message----- From: Robert Cummings [mailto:robert@xxxxxxxxxxxxx] Sent: 26 August 2006 16:42 To: Alex Turner Cc: php-general@xxxxxxxxxxxxx Subject: Re: Brain Death - [PHP] functions classes On Sat, 2006-08-26 at 12:49 +0100, Alex Turner wrote: > I don't know what I was on when I wrote the previous post! > > In php you cannot create static class variables in this way (doh) or at > least I never have managed. So when faced the this problem I replace > what in C++ would be a class variable with a class function > > comme ca: > > class MyClass > { > function MyVar($val = null) > { > static $datum; > if(is_null($val)) > { > return $datum; > } > $dataum=$val; > } > > } > > I definitely need more coffee! Talking about coffee... your above code could use some. Try this: <?php class MyClass { function MyVar( $val=null ) { static $datum; if( $val === null ) { return $datum; } $datum = $val; } } ?> But also I'd recommend fixing the the problem whereby you can't set $datum to the null value, otherwise you may run into unexpected issues down the road. <?php class MyClass { function MyVar( $val=null, $set=false ) { static $datum; if( $set === false ) { return $datum; } $datum = $val; } } ?> Cheers, Rob. -- .------------------------------------------------------------. | InterJinn Application Framework - http://www.interjinn.com | :------------------------------------------------------------: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `------------------------------------------------------------' -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.11.6/427 - Release Date: 24/08/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.405 / Virus Database: 268.11.6/427 - Release Date: 24/08/2006 -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
