note 9999 added to Functions
| From: | php-general at list dot php dot net | Date: | Tue, 05 Dec 2000 21:51:37 +0000 |
| Subject: | note 9999 added to Functions | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-8435@lists.php.net to get a copy of this message | ||
If a user-defined function does not explicitly return a value, then it
will return NULL. For most truth tests, this can be considered as FALSE.
For example:
function print_list ($array)
{
print implode ("<br />", $array);
}
if (print_list ($HTTP_POST_VARS))
print "The print_list function returned a value that can be considered true."
else
print "The print_list function returned a value that can be considered false."
http://www.php.net/manual/functions.php