Heh, lucky me I was just looking into that earlier today. http://us.php.net/manual/en/language.types.string.php
Around the "Simple Syntax" area. -Logan -----Original Message----- From: Robert Cummings [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 25, 2007 9:42 AM To: Man-wai Chang Cc: php-general@lists.php.net Subject: Re: [PHP] ${} On Wed, 2007-04-25 at 21:23 +0800, Man-wai Chang wrote: > where can I find the documentation about this "symbol"? Maybe in the documentation? A cursory glance from me though didn't turn anything up. Either way I can inform you of the purpose... The following two expression have the same result: $foo = 5; ${'foo'} = 5; The difference being that the code between { and } is first evaluated to determine the name of the variable. $foo is preferred and faster but there may be the odd time when you find doing something like the following useful: ${'foo_'.$i} = $someValue; So let's imagine $i = 3, then a variable called $foo_3 has been created and can even be accessed as $foo_3. If you are familiar with variable variables then you may be aware that the above can also be achieved as follows: $name = 'foo_'.$i; $$name = $someValue; 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. | `------------------------------------------------------------' -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
