在PHP Xampp上安装ibm db 2 ext

When I try to connect to a IBM DB 2 database, I get an error Call to undefined function db2_connect() I think the library php_ibm_db2 is not established

My php.ini

;;;;;;;;;;;;;;;;;;;;;;
; Dynamic Extensions ;
;;;;;;;;;;;;;;;;;;;;;;

..

;extension=pdo_firebird
extension=pdo_mysql
extension=php_pdo_ibm.dll
;extension=pdo_oci
extension=pdo_odbc
;extension=pdo_pgsql
extension=pdo_sqlite
;extension=pgsql
;extension=shmop
extension=php_ibm_db2.dll
extension=php_ibm_db2

The lib in path xampp/php/ext

php info not showed this lib in list Any ideas ?

There is answer from another stackoverflow post:

DB2 is an extension and must be installed separately before its functions are made available.

http://php.net/manual/en/ibm-db2.installation.php

it appears it is necessary before installation in phpinfo()

  1. thread safe ot thread safe (NTS \ TS)
  2. x64 - x86 version

After that download here lib php_ibm_db2 dll