You can easily install PDFlib on linux server.
==========================
cd /usr/local/src/
wget ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/packages/distfiles/PDFlib-Lite-7.0.3.tar.gz
or
check this URL http://www.filewatcher.com/m/PDFlib-Lite-7.0.3.tar.gz.5898798.0.0.html
tar -zxf PDFlib-Lite-7.0.3.tar.gz
cd PDFlib-Lite-7.0.3
./configure
make
make install
mount -o remount rw /tmp
pecl install pdflib
mount -o remount noexec,nosuid,rw /tmp
php -m | grep pdf
==========================
Done