variable functions: empty/isset/unset invalid?
| From: | Philip Olson | Date: | Mon, 07 May 2001 17:03:41 +0000 |
| Subject: | variable functions: empty/isset/unset invalid? | ||
| Groups: | php.general | ||
| Request: | Send a blank email to php-general+get-51774@lists.php.net to get a copy of this message | ||
This does not work as expected (as I expect it at least) and gives the
following error. This seems to result with use of empty(), isset(), and
unset(), perhaps others :
Call to undefined function: empty()
When using :
$foo = 'empty';
if ($foo($var)) print 'worked.';
Of course the following works as expected.
if (empty($var)) print 'worked.';
And with other functions :
$foo = 'somefunction';
if ($foo($var)) print 'worked.';
Why won't variable functions work with empty/isset/unset this way? And
why the 'undefined function' fatal error?
regards,
philip