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php中开启pdo，多次尝试均失败，请问原因

WBOY
Release： 2016-06-13 12:56:20
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php中开启pdo，多次尝试均失败，请教原因
我用的是wamp开发环境。
php版本是5.25
extension_dir:c:/wamp/php/ext
此路径中 php_pdo.dll
         php_pdo_mysql.dll
         .....
等等扩展文件都是存在的。
php.ini中，扩展路径如上，没有错误。
然后开启php.ini中的
extension=php_pdo.dll
extension=php_pdo_mysql.dll
重启apache
新建一个页面：phpinfo() 查看pdo开启情况。结果让人大跌眼镜：
页面中显示如下：
PDO
PDO support enabled 
PDO drivers  sqlite, sqlite2  

无论我怎么尝试，PDO dirvers 中都没有mysql。只有sqlite

求助解决问题的办法！！


------解决方案--------------------
有没有打开mysql的扩展？
Related labels：
mysql nbsp pdo php
source：php.cn
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