users guide: php warnings

[VincentMcIntyre]

Clicking on this link: ​http://pulsararchive-int.atnf.csiro.au/pulsar_archive_guide.html, I get warnings like this at the top and bottom of the page.

Warning: include_once(header.html) [function.include-once]: failed to open stream: No such file or directory in /var/www/vhosts/pulsararchive.atnf.csiro.au/htdocs/pulsar_archive_guide.html on line 20

These should be fixed, and preferably also caught with a try {} except { } structure so the user never sees them. They should show up in the error logs so we can notice and fix.

[Jonathan Khoo]

I've tried a number of times to replicate this error but access the page, it loads as expected. Please re-open this ticket if necessary.