真心求解：apache+php+mysql配置问题

apache2.2
php-5.3.8-Win32-VC9-x86
mysql-5.0.22-win32
apache连接Php测试成功……
而php连接mysql配置出问题……求解、、
测试代码：
<?php
$mysql = mysql_connect('localhost','root','123');

if($mysql) 
{
echo "成功";
}
else
{
echo "失败";
}
mysql_close();
?>
错误：Fatal error: Call to undefined function mysql_connect() in D:\Apache2.2\htdocs\index.php on line 2

显然您没有加载 php_mysql 扩展