[Tickets #5077] When trying to export in vCard format, a fatal PHP error occurs

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Ticket URL: http://bugs.horde.org/ticket/?id=5077
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 Ticket             | 5077
 Created By         | Otto.Stolz at uni-konstanz.de
 Summary            | When trying to export in vCard format, a fatal PHP error occurs
 Queue              | Turba
 Version            | 2.1.3
 Type               | Bug
 State              | Unconfirmed
 Priority           | 3. High
 Owners             | 
+New Attachment     | sources.php
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Otto.Stolz at uni-konstanz.de (2007-03-07 04:47) wrote:

On a Linux system (openSUSE 10.2) with PHP 5.2.0, whenever I try to export
my personal address book, in vCard format, the page goes blank.

The PHP error log reports: »PHP Fatal error:  Using $this when not in
object context in /var/srv/www/htdocs/horde/turba/lib/Driver.php on line
755«

The Apache error log reports: » [client 134.34.1.209] PHP Fatal error:
Using $this when not in object context in
/var/srv/www/htdocs/horde/turba/lib/Driver.php on line 755, referer:
https://pauki.rz.uni-konstanz.de/horde/turba/data.php«.

There is no pertinent entry in the Horde log.

Export in any other format, and import, work well, as does vCard export in
an Solaris (SunOS 5.9) + PHP 4.4.4 implementation.

Attached is the pertinent excerpt from tuirba/config/sources.php.