https://github.com/smalot/pdfparser
PdfParser is a pdf library written in PHP, extraction oriented.
Copyright (C) 2017 - Sébastien MALOT sebastien@malot.fr
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program.
If not, see http://www.pdfparser.org/sites/default/LICENSE.txt.