The documentation entry for pspell_new_config() at:

http://www.php.net/manual/en/function.pspell-new-config.php

appears to be incorrect.

The example from the page doesn't actually use 
pspell_new_config at all.  A correct example usage is as 
follows:

$pspell_config = pspell_config_create ("en");
pspell_config_personal ($pspell_config, 
"/var/dictionaries/custom.pws");
pspell_config_repl ($pspell_config, 
"/var/dictionaries/custom.repl");
$pspell_link = pspell_new_config ($pspell_config);

Note the different last line.