Hello,

You want QR-Code for the Wordpress WP-Print Plugin? In that case, you need the included "print-posts.php" file, which is extended by me. I use Google-Chart-API for QR-Code generation.

More Information about Wordpress, QR-Code and WP-Print: https://blackseals.net/?p=13018
More Information about Google-Chart-API: https://blackseals.net/?p=5482



You must upload the "print-posts.php" file to "wp-content/plugins/wp-print" and overwrite the original file. You are also able to rename the original file prior uploading the extended file.
Also Permalinks should be enabled to support Wordpress Shortlink: https://blackseals.net/?p=5474



Tested with Wordpress 5.9 and WP-Print 2.58.2.
Original Plugin: https://wordpress.org/extend/plugins/wp-print/

You are able to contact me at https://kontakt.blackseals.net