http://php.net/manual/en/ref.ifx.php
"HowY 09-Feb-2007 08:58
One very frustrating experience with interfacing
Informix and unixODBC (on RHEL4 - PHP 5.20)
was the constant Informix error:
[SQLSTATE=IX 001 SQLCODE=-1829]
Unable to load locale categories
& the non existant handles from unixODBC calls.
This is an issue of the environment being set correctly
which I thought was - phpinfo() reported that the apache
environment was correct <_server=> I even went as far as
to Put/Setenv in httpd.conf.
The hint is in the php 'environment' block
- it did not contain the env strings.
The fix was to insert the environment strings in the httpd
start-up script (/etc/init.d/httpd) which pushed the
environment correctly when the server starts up.
Hope to save someone else the hours...."
(Hajdan az itt említettel megegyező problémám és megoldásom volt az apache-php-db2 konstellációban, ezért sejtettem, hogy nem rendkívüli az eset.)