php - MySQLi not found error -

i deployed website staging environment , getting following error:

fatal error: class 'mysqli' not found in d:\clientsites\baileyboiler.com\www\new\php\db.php on line 11

at first assumed mysqli not installed, running phpinfo() reveals following:

enter image description here

to me looks mysqli installed (though reading wrong). should do?

code

class db {     public static function getconnection()     {         return new mysqli(dbhost, dbuser, dbpassword, defaultdatabase);     } }

(line 11 return new mysql(...);)

update

i added extension=php_mysqli.dll php.ini located @ /windows/php.ini (according phpinfo(), 1 being loaded):

loaded configuration file   c:\windows\php.ini

but error persists. know mysqli.dll exists @ c:\php\ext - because can see file. now?

i got error corrected enabling/editing following config in php.ini:

1st (uncomment , add config):

include_path = "c:\php\includes"

2nd (uncomment):

extension_dir = "ext"

3rd (uncomment , edit config):

extension=d:/php/ext/php_mysql.dll extension=d:/php/ext/php_mysqli.dll

Enable