RE: [PHP] PHP 5.2 array() == null

On Tue, 2007-05-15 at 17:27 +0100, Edward Kay wrote: > > -----Original Message----- > > From: dominic.letz@berlin.de [mailto:dominic.letz@berlin.de] > > Sent: 15 May 2007 16:48 > > To: php-general@lists.php.net > > Subject: [PHP] PHP 5.2 array() == null > > > > > > Hi people > > > > i was just curios to ask whether > > > > array() == null should always return true. and then why > > > > i'm testing this with php 5.2.2 > > > > greetings > > > > dominic letz > > > > According to Table Q.2 at > http://www.php.net/manual/en/types.comparisons.php, array() == > NULL will > always return TRUE. > > Remember == is a loose comparison. I think this is a result of the > following: > > array() == FALSE is TRUE (because it's empty?) Yes, being empty is why it is equivalent to boolean false. It makes it simple and self explanatory to do code like the following: <?php if( $array ) { // do something since it's not empty } else { // sorry nothing was found. } ?> This is preferable to using the count() function since no function overhead is incurred. 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. | `------------------------------------------------------------'