PHPBB3 in GlassFish4

Question

I'm trying to run PHPBB3 forums in Glassfish 4 using quercus 4.0.39 but I'm getting the error below error, i made test page contains <?php phpinfo(); ?> and worked fine ,I don't know anything about PHP

com.caucho.quercus.UnimplementedException: `mb_substitute_character' has not been implemented.

Answer 1

<?php phpinfo(); ?> always worked fine, but please make sure the 'mbstring' libary already included.