php PDO does not work

From	test japan <testatjapan@gmail.com>
Newsgroups	comp.lang.php
Subject	php PDO does not work
Date	2012-03-03 07:10 -0800
Organization	http://groups.google.com
Message-ID	<427252.950.1330787450521.JavaMail.geo-discussion-forums@pbcwi5> (permalink)

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i installed php and mysql on archlinux by pacman,
and in phpinfo page, i can see the infomation about mysql & pdo_mysql

in php.ini, i uncommented the following lines:
extension=mysqli.so
extension=mysql.so
extension=pdo_mysql.so

but when running the code below, the browser shows a blank page
no result, even no error message.

    try {
        $dbh = new PDO("mysql:host=192.168.0.1;dbname=testdb", "username", "password");
        echo 'Connected to database!!';
    } catch (PDOException ex) {
        echo $ex->getMessage();
   

anyone can help me？
thanks！

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php PDO does not work test japan <testatjapan@gmail.com> - 2012-03-03 07:10 -0800
  Re: php PDO does not work Luuk <luuk@invalid.lan> - 2012-03-03 16:34 +0100
  Re: php PDO does not work Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-03 12:59 -0500
    Re: php PDO does not work test japan <testatjapan@gmail.com> - 2012-03-03 17:08 -0800
  Re: php PDO does not work "Álvaro G. Vicario" <alvaro.NOSPAMTHANX@demogracia.com.invalid> - 2012-03-05 10:23 +0100
    Re: php PDO does not work Jerry Stuckle <jstucklex@attglobal.net> - 2012-03-05 08:04 -0500

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