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

mysql> use test

Database changed

mysql> source e:/sql/DB.SQL;

Query OK, 0 rows affected (0.03 sec)

php.ini里也打开了

;

;extension=php_bz2.dll

;extension=php_curl.dll

;extension=php_fileinfo.dll

extension=php_gd2.dll

;extension=php_gettext.dll

;extension=php_gmp.dll

;extension=php_intl.dll

;extension=php_imap.dll

;extension=php_interbase.dll

;extension=php_ldap.dll

extension=php_mbstring.dll

;extension=php_exif.dll      ; Must be after mbstring as it depends on it

extension=php_mysql.dll

;extension=php_mysqli.dll

;extension=php_oci8.dll      ; Use with Oracle 10gR2 Instant Client

;extension=php_oci8_11g.dll  ; Use with Oracle 11gR2 Instant Client

;extension=php_openssl.dll

;extension=php_pdo_firebird.dll

extension=php_pdo_mysql.dll

;extension=php_pdo_oci.dll

;extension=php_pdo_odbc.dll

;extension=php_pdo_pgsql.dll

;extension=php_pdo_sqlite.dll

;extension=php_pgsql.dll

;extension=php_pspell.dll

;extension=php_shmop.dll

phpinfo();显示里 只有mysqld：

mysqlnd



mysqlnd	enabled

Version	mysqlnd 5.0.10 - 20111026 - $Id: e707c415db32080b3752b232487a435ee0372157 $

Compression	supported

SSL	supported

Command buffer size	4096

Read buffer size	32768

Read timeout	31536000

Collecting statistics	Yes

Collecting memory statistics	No

Tracing	n/a

Loaded plugins	mysqlnd,example,debug_trace,auth_plugin_mysql_native_password,auth_plugin_mysql_clear_password

API Extensions	no value



mysqlnd statistics	

bytes_sent

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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--------------------