php.ini扩充开了，为什么找不到mysql模块，无法连接mysql

php.ini扩展开了，为什么找不到mysql模块，无法连接mysql啊
如题

mysql也是可以连接的

<br />
mysql> use test<br />
Database changed<br />
mysql> source e:/sql/DB.SQL;<br />
Query OK, 0 rows affected (0.03 sec)<br />
<br />

php.ini里也打开了

<br />
;<br />
;extension=php_bz2.dll<br />
;extension=php_curl.dll<br />
;extension=php_fileinfo.dll<br />
extension=php_gd2.dll<br />
;extension=php_gettext.dll<br />
;extension=php_gmp.dll<br />
;extension=php_intl.dll<br />
;extension=php_imap.dll<br />
;extension=php_interbase.dll<br />
;extension=php_ldap.dll<br />
extension=php_mbstring.dll<br />
;extension=php_exif.dll      ; Must be after mbstring as it depends on it<br />
extension=php_mysql.dll<br />
;extension=php_mysqli.dll<br />
;extension=php_oci8.dll      ; Use with Oracle 10gR2 Instant Client<br />
;extension=php_oci8_11g.dll  ; Use with Oracle 11gR2 Instant Client<br />
;extension=php_openssl.dll<br />
;extension=php_pdo_firebird.dll<br />
extension=php_pdo_mysql.dll<br />
;extension=php_pdo_oci.dll<br />
;extension=php_pdo_odbc.dll<br />
;extension=php_pdo_pgsql.dll<br />
;extension=php_pdo_sqlite.dll<br />
;extension=php_pgsql.dll<br />
;extension=php_pspell.dll<br />
;extension=php_shmop.dll<br />

phpinfo();显示里 只有mysqld：

<br />
mysqlnd<br />
<br />
mysqlnd	enabled<br />
Version	mysqlnd 5.0.10 - 20111026 - $Id: e707c415db32080b3752b232487a435ee0372157 $<br />
Compression	supported<br />
SSL	supported<br />
Command buffer size	4096<br />
Read buffer size	32768<br />
Read timeout	31536000<br />
Collecting statistics	Yes<br />
Collecting memory statistics	No<br />
Tracing	n/a<br />
Loaded plugins	mysqlnd,example,debug_trace,auth_plugin_mysql_native_password,auth_plugin_mysql_clear_password<br />
API Extensions	no value<br />
<br />
mysqlnd statistics	<br />
bytes_sent<br />

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------解决方案--------------------

extension=php_mysqli.dll

------解决方案--------------------
phpinfo();同时也显示了使用的php.ini在哪里
请检查是否与你修改的一致
------解决方案--------------------