--- title: "PHP Plain Samples Project" description: "PHP plain samples project showing PKI Express with Web PKI on PHP 5.5+ (including 7.x), hosted on GitHub, and the steps to run it." canonical: "https://docs.lacunasoftware.com/en-us/articles/pki-express/php/plain" locale: "en" product: "PKI Express" last_updated: "2026-10-12" --- # PHP Plain Samples Project This *samples project* shows how to use [PKI Express](https://docs.lacunasoftware.com/en-us/articles/pki-express) together with the [Web PKI](https://docs.lacunasoftware.com/en-us/articles/web-pki) browser component on a **PHP 5.5+ plain** project (including 7.x). This project is hosted on GitHub: [https://github.com/LacunaSoftware/PkiSuiteSamples/tree/master/php/plain](https://github.com/LacunaSoftware/PkiSuiteSamples/tree/master/php/plain) > **Note** > > If you are using a previous version of PHP, please [contact us](https://www.lacunasoftware.com/en/home/purchase). ## Running The Project Follow these steps to run the sample: 1. [Install PKI Express](https://docs.lacunasoftware.com/en-us/articles/pki-express/setup) 1. [Download the project](https://github.com/LacunaSoftware/PkiSuiteSamples/archive/master.zip) or clone the repository: [https://github.com/LacunaSoftware/PkiSuiteSamples.git](https://github.com/LacunaSoftware/PkiSuiteSamples.git) 1. Navigate to the folder `/php/plain` 1. In a command prompt, run the command `composer install` to install the dependencies (if you don't have Composer installed, get it [here](https://getcomposer.org/)) 1. Execute the project by running the command `composer start` 1. Access the URL [http://localhost:8000](http://localhost:8000) ## Project Map This section lists where to find the relevant parts in each feature sample on the project: ### Authentication With Digital Certificates - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/authentication-express/index.php) - JavaScript: [authentication-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/authentication-form.js) - [complete.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/authentication-express/complete.php) ### PAdES Signature With File Already on Server After choosing one of the available server files (which is crudely implemented for demonstration purposes on [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/server-files/index.php) and [action.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/server-files/action.php)), the control flow is performed by the following files: - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/pades-signature-express/index.php) - JavaScript: [signature-start-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-start-form.js) - [start.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/pades-signature-express/start.php) - JavaScript: [signature-complete-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-complete-form.js) - [complete.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/pades-signature-express/complete.php) ### PAdES Signature With File Uploaded by User After the file upload (which is crudely implemented for demonstration purposes on [upload.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/upload.php)) is done, the control flow is performed by the following files: - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/pades-signature-express/index.php) - JavaScript: [signature-start-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-start-form.js) - [start.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/pades-signature-express/start.php) - JavaScript: [signature-complete-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-complete-form.js) - [complete.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/pades-signature-express/complete.php) ### PAdES Co-Signature After choosing one of the available **already-signed** server files (which is crudely implemented for demonstration purposes on [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/server-files/index.php) and [action.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/server-files/action.php)), the control flow is performed by the following files: - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/pades-signature-express/index.php) - JavaScript: [signature-start-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-start-form.js) - [start.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/pades-signature-express/start.php) - JavaScript: [signature-complete-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-complete-form.js) - [complete.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/pades-signature-express/complete.php) ### PAdES Signature Using a Server Key After the file upload (which is crudely implemented for demonstration purposes on [upload.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/upload.php)) is done, the control flow is performed by the following files: - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/pades-server-key-express/index.php) ### Batch of PAdES Signatures - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/batch-pades-signature-rest/index.php) - JavaScript: [batch-signature-rest-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/batch-signature-rest-form.js) - Ajax handlers: [start.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/batch-pades-signature-rest/start.php) and [complete.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/batch-pades-signature-rest/complete.php) ### Open/Validate an Existing PAdES Signature After the file upload (which is crudely implemented for demonstration purposes on [upload.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/upload.php)) is done, the control flow is performed by the following files: - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/open-pades-rest/index.php) ### Printer-Friendly Version From a PAdES Signature Not yet available on this project. ### CAdES Signature With File Already on Server After choosing one of the available server files (which is crudely implemented for demonstration purposes on [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/server-files/index.php) and [action.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/server-files/action.php)), the control flow is performed by the following files: - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/cades-signature-express/index.php) - JavaScript: [signature-start-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-start-form.js) - [start.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/cades-signature-express/start.php) - JavaScript: [signature-complete-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-complete-form.js) - [complete.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/cades-signature-express/complete.php) ### CAdES Signature With File Uploaded by User After the file upload (which is crudely implemented for demonstration purposes on [upload.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/upload.php)) is done, the control flow is performed by the following files: - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/cades-signature-express/index.php) - JavaScript: [signature-start-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-start-form.js) - [start.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/cades-signature-express/start.php) - JavaScript: [signature-complete-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-complete-form.js) - [complete.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/cades-signature-express/complete.php) ### CAdES Co-Signature After choosing one of the available **already-signed** server files (which is crudely implemented for demonstration purposes on [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/server-files/index.php) and [action.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/server-files/action.php)), the control flow is performed by the following files: - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/cades-signature-express/index.php) - JavaScript: [signature-start-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-start-form.js) - [start.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/cades-signature-express/start.php) - JavaScript: [signature-complete-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-complete-form.js) - [complete.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/cades-signature-express/complete.php) ### CAdES Signature Using a Server Key After the file upload (which is crudely implemented for demonstration purposes on [upload.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/upload.php)) is done, the control flow is performed by the following files: - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/cades-server-key-express/index.php) ### Batch of CAdES Signatures Not yet available on this project. ### Open/Validate an Existing CAdES Signature After the file upload (which is crudely implemented for demonstration purposes on [upload.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/upload.php)) is done, the control flow is performed by the following files: - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/open-cades-express/index.php) ### Printer-Friendly Version From a CAdES Signature Not yet available on this project. ### Signature Package From a CAdES Signature Not yet available on this project. ### XML Signature of The Entire Document Not yet available on this project. ### XML Signature of a Brazillian NFe Document - [index.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/xml-nfe-signature-express/index.php) - JavaScript: [signature-start-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-start-form.js) - [start.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/xml-nfe-signature-express/start.php) - JavaScript: [signature-complete-form.js](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/scripts/signature-complete-form.js) - [complete.php](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/xml-nfe-signature-express/complete.php) ### XML Signature of a COD Document Not yet available on this project. ### Open/Validate Signatures on an Existing XML Document Not yet available on this project. **Demos and samples** - Sign a COD XML using PKI Express: [PHP](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/xml-cod-signature-express/index.php) - Validate a signed XML using PKI Express: [PHP](https://github.com/LacunaSoftware/PkiSuiteSamples/blob/master/php/plain/public/open-xml-express/index.php)