U.Porto Vouchers
The plugin creates a Custom Post Type (vouchers). For every post a QR Code using Google Charts is generated, download and converted to JPG (the original is PNG). For the Custom Post Type a custom dropdown with 3 states is create as a custom field for every post. The states are "active", "used" and inactive. This custom field is used as a validation mechanism. It dosen't do much more than change the content of the custom field. WP-MPDF is integrated on the plugin to allow a PDF to be generated and downloaded.
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Install
This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.
Install straight from GitHub with WP-CLI:
wp plugin install https://github.com/pedrocandeias/uportovouchers/archive/refs/heads/master.zipNo built-in updater. New versions won't appear under Dashboard → Updates. Install new releases yourself, or let Git Updater track the repository.