I had a bunch of PDF's that needed to be merged into one PDF file and present it as a file download to the user. To do this I first installed Pdftk (the pdf tookit) on the server then ran the command via shell_exec(). Steps with code below.
- SSH into the server and run apt-get install pdftk.
- The command line to merge is pdftk 1.pdf 2.pdf 3.pdf cat output 123.pdf where 1.pdf, 2.pdf and 3.pdf are the files to merge and 123.pdf is the merged file.
- PHP Code:
<?php $command = 'pdftk 1.pdf 2.pdf 3.pdf cat output 123.pdf'; $result = shell_exec($command); header('Content-disposition: attachment; filename=123.pdf'); header('Content-type: application/pdf'); readfile('123.pdf'); ?>