I have installed porter stemmer:
pecl install stem
...
Compile Danish stemmer? [yes] : n
Compile Dutch stemmer? [yes] : n
Compile English stemmer? [yes] : y
Compile Finnish stemmer? [yes] : n
Compile French stemmer? [yes] : n
Compile German stemmer? [yes] : n
Compile Hungarian stemmer? [yes] : n
Compile Italian stemmer? [yes] : y
Compile Norwegian stemmer? [yes] : n
Compile Portuguese stemmer? [yes] : n
Compile Romanian stemmer? [yes] : n
Compile Russian stemmer? [yes] : y
Compile Russian (UTF8) stemmer? [yes] : y
Compile Spanish stemmer? [yes] : n
Compile Swedish stemmer? [yes] : n
Compile Turkish (UTF8) stemmer? [yes] : n
I have added
extension=stem.so
string in the end of php.ini file and ...
service apache2 restart
But phpinfo shows me:
stem
stem support enabled
version 1.5.1
compiled as dynamic module
Languages Supported
Original Porter enabled (default)
Danish disabled
Dutch disabled
English disabled
Finnish disabled
French disabled
German disabled
Hungarian disabled
Italian disabled
Norwegian disabled
Portuguese disabled
Romanian disabled
Russian disabled
Russian (Unicode) disabled
Spanish disabled
Swedish disabled
Turkish (Unicode) disabled
...and function stem_english does not exists.
How to enable languages?
P.S.: And this text I have to insert to avoid "looks like mostly code" error. Moderators can remove it.