Unexpected Behavior with extension_dir Directive

Hi I am trying to use the php.ini extension_dir directive to add additional directories to check while searching for extensions. I assumed that I could use normal UNIX combined path specifications as in: extension_dir = ./:/another/lib However, when I start apache, the php error log says: PHP Warning: Unknown(): Unable to load dynamic library './:/another/lib/php_eoapi.so' - ./:/another/lib/php_eoapi.so: cannot open shared object file: No such file or directory in Unknown on line 0. Neither the online documentation nor the comments in the php.ini file are much help. Can someone tell what the proper way to specify more than one extension search path is? Thanks in advance, Bruce FYI, I am using PHP Version 4.3.1 on Red Hat Linux Bruce Bailey 2525 SW First Avenue Portland, OR 97201 (503) 294-4206 Bruce_Bailey@adp.com