For this there's a PHP library called FPDF (with FPDI):
http://www.fpdf.org
http://www.setasign.de/products/pdf-php-solutions/fpdi/
These will let you open an pdf and add content to it in PHP. I'm guessing you can also use their functionality to search through the existing content for the values you need.
Another possible library is TCPDF: http://www.tecnick.com/public/code/cp_dpage.php?aiocp_dp=tcpdf
http://www.fpdf.org
http://www.setasign.de/products/pdf-php-solutions/fpdi/
These will let you open an pdf and add content to it in PHP. I'm guessing you can also use their functionality to search through the existing content for the values you need.
Another possible library is TCPDF: http://www.tecnick.com/public/code/cp_dpage.php?aiocp_dp=tcpdf