PHP Continuous Integration (CI) with Jenkins and Travis CI

Continuous Integration (CI) is a software development practice that involves regularly integrating code changes into a shared repository, followed by automated testing and builds. In this guide, we'll explore the implementation of PHP CI using Jenkins and Travis CI, including sample code:

1. Introduction to Continuous Integration

Continuous Integration is crucial for maintaining code quality and streamlining the development process. It involves the following key steps:

• Committing code changes to a version control system (e.g., Git).
• Automatically triggering a CI pipeline on code changes.
• Running automated tests to verify code quality.
• Building and packaging the application for deployment.

2. Setting Up Jenkins

Jenkins is a widely-used open-source automation server that can be used for CI. Install Jenkins on your server, configure it, and create a Jenkins job for your PHP project. You can define build steps in your job's configuration, including running tests and building the application.

3. Sample Jenkinsfile

Create a Jenkinsfile in your project repository to define your CI pipeline. Here's a simplified example for a PHP project:

        pipeline {
            agent any
            stages {
                stage('Checkout') {
                    steps {
                        checkout scm
                    }
                }
                stage('Install Dependencies') {
                    steps {
                        sh 'composer install'
                    }
                }
                stage('Run Tests') {
                    steps {
                        sh 'phpunit'
                    }
                }
                stage('Build and Deploy') {
                    steps {
                        sh 'php build.php'
                    }
                }
            }
        }
    

4. Setting Up Travis CI

Travis CI is a cloud-based CI service that integrates with your GitHub repository. Configure your PHP project on Travis CI by creating a `.travis.yml` file in your repository. Define your build and test scripts in this file.

5. Sample .travis.yml

Here's an example of a `.travis.yml` file for a PHP project:

        language: php
        php:
            - 7.4
        install:
            - composer install
        script:
            - phpunit
        deploy:
            provider: script
            script: php build.php
            on:
                branch: main
    

6. Conclusion

Implementing PHP Continuous Integration with Jenkins and Travis CI streamlines the development process and ensures code quality through automated testing and building. By following the steps outlined in this guide and customizing the CI configuration to your specific project, you can establish a robust CI pipeline for your PHP applications.