Why am I getting the error "Class PDO not found" in this situation?

I am getting the following error even though I have PDO installed and included in my php.ini.

What could I be possibly missing? I am using doctrine and codeigniter

<div style="border:1px solid #990000;padding-left:20px;margin:0 0 10px 0;">

<h4>A PHP Error was encountered</h4>

<p>Severity: Warning</p>
<p>Message:  Doctrine\ORM\Query\ParameterTypeInferer::inferType() [<a href='doctrine\orm\query\parametertypeinferer.infertype'>doctrine\orm\query\parametertypeinferer.infertype</a>]: It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting 开发者_StackOverflowor the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Chicago' for 'CDT/-5.0/DST' instead</p>
<p>Filename: Query/ParameterTypeInferer.php</p>
<p>Line Number: 70</p>

</div><br />
<b>Fatal error</b>:  Class 'PDO' not found in <b>/home/mrwongs/public_html/engine/application/third_party/Doctrine/ORM/Query/ParameterTypeInferer.php</b> on line <b>70</b><br />

My phpinfo can be seen at: http://173.203.85.196/test.php

In my php.ini I have the following 2 lines:

extension=pdo.so
extension=pdo_mysql.so

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Are you getting this error on a webpage? or running from cli?

php-cli might be using a different php.ini

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Restart the apache server. If you haven't done so.