Apoll Component Error - Joomla! Forum - community, help and support

i installed apoll component (that poll component shows results via flash graphic) gives error in result page.
i use joomla!
1.5.10

error:

code: select all

fatal error: call undefined function mb_substr() in
/home/*****/public_html/components/com_apoll/views /apoll/view.html.php on line
221

how can fix it?

the function mb_substr() supports multibyte strings has been in php since version 4.0.6. version of php server run?

mbstring not enabled in php default, may explain why error. can find out if php supports multibyte string functions. go - system info - php settings. check following line:

code: select all

mbstring enabled:   yes

for example in wampserver 1 can enable php_mbstring extension wamp icon in system tray. in hosting environment need talk hosting company.