PHP, iconv() and www/moodle

[Stephen Borrill <netbsd%precedence.co.uk@localhost>]

I'm trying to install Moodle 2.2.x (not from pkgsrc), but it fails because 
iconv() is deemed to be not working.

echo  "<?php echo iconv('UTF-8', 'UTF-8//IGNORE', 'abc'); ?>" | php

This should return 'abc', but returns nothing.

What's at fault here?

I looked at pkgsrc/www/moodle to see if it was patched around, but that's 
only version 2.1.3 and doesn't have the iconv() checks in its installer.

--
Stephen