Error after upgrading PHP

I just upgraded the PHP version on my server to 5.5 (5.6 is coming but this is where I'm at at the moment) when it was complete, I noticed the following error on a couple of sites (not all) running CodeIgniter.  I updated those sites from CI 3.0.2 to 3.0.4 but the error persists.  It doesn't seem to affect functionality at all,  it just sits at the bottom of my page & looks ugly. It seems it is printed to the screen AFTER the view files are all called.

Any ideas where this is coming from?

Code:

A PHP Error was encountered

Severity: Core Warning

Message: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20121212/pdf.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20121212/pdf.so: cannot open shared object file: No such file or directory

Filename: Unknown

Line Number: 0

Backtrace:

Thanks.

Russ

It appears your PHP installation is configured to load http://www.php.net/manual/en/intro.pdf.php and cannot find it.

It appears your PHP installation is configured to load http://www.php.net/manual/en/intro.pdf.php and cannot find it.

Thanks for the reply... We commented the line out in php.ini calling it & it's all working correctly now.

Russ