Reference
http://kamakura.cool.ne.jp/oppama/oswa/phpldap.htmlhttp://php.s3.to/man/function.ldap-search.html
http://www.linux.or.jp/JF/JFdocs/LDAP-HOWTO-6.html#ss6.4
http://www.zend.co.jp/products/studio/ZendInformationCenter/php_manual/php_function_refrence/ref.ldap.html
http://www.ku3g.org/negi/diary/?200209b#200209120
http://ukai.jp/Articles/2002/uu-ldap/account-local.html