7 Continuous Integration Tools for PHP Laravel Developers

7 Continuous Integration Tools for PHP Laravel Developers

In this article we’ll learn about 7 tools that you can use to set up a rock-solid continuous integration (CI) process for your PHP project.

In this article we’ll learn about 7 tools that you can use to set up a rock-solid continuous integration (CI) process for your PHP project.

The game plan is to setup various tests for our code, without having to provision or maintain any servers. Having a quick feedback cycle, we’ll be able to catch errors early and fix them before they grow.

Sounds good? Let’s get started.

Code analysis tests

Code analysis consists of scanning the source for certain structures that may point to deeper problems, such as design flaws and bad coding practices, usually called code smells.

Some code analysis tools focus on finding out bad patterns: functions with too many parameters, fat classes or too deeply nested structures. While others check for style: indentation rules, name conventions, etc.

Every analysis must start with some standard to follow. These rules are, at the end of the day, subjective but informed by previous experience. The rules can be generally configured and customized.

PHP Mess Detector

PHP Mess Detector (phpmd) checks for code smells: awkward, overcomplicated or unused code. It is inspired by the PMD project.

phpmd ships with several rulesets than can be enabled or disabled independently.

Basic usage:

$ phpmd SOURCE_FILE_OR_DIR REPORT_FORMAT RULESETS

Built-in rules are:

  • cleancode: enforce clean code base rules.
  • codesize: complexity rules, excessively long classes, etc.
  • controversial: camelcase rules, globals, etc.
  • design: forbid eval, goto, exit. Also coupling and depth rules.
  • naming: long and short identifier names, method name rules.
  • unusedcode: dead code and unused variables rules.

What does it look like?

$ phpmd src text cleancode,codesize,controversial,design,naming,unusedcode
ProvisionerCommand.php:38    The variable $myvar_id is not named in camelCase.
ProvisionerCommand.php:38    Avoid variables with short names like $io. Configured minimum length is 3.
PermissionsComponent.php:53     Avoid unused private methods such as 'checkAccount'.
PagesController.php:349   Avoid excessively long variable names like $view_registration_count. Keep variable name length under 20.
ProvisionersController.php:106    The method delete uses an else expression. Else is never necessary and you can simplify the code to work without else.

If you’ve never done any code analysis on your project before, it is likely to make you want to pull your hairs out. Don’t worry and be patient, after we have gotten our code in order our lives will be easier.

Instead of setting the rules by command line, we can create an xml file that can be checked in source control:

$ phpmd src text myrules.xml

<ruleset name="Basic"
         xmlns="http://pmd.sf.net/ruleset/1.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://pmd.sf.net/ruleset/1.0.0
                     http://pmd.sf.net/ruleset_xml_schema.xsd"
         xsi:noNamespaceSchemaLocation="
                     http://pmd.sf.net/ruleset_xml_schema.xsd">
    
        First basic ruleset for code analysis...
    

    
    
    
    
    

    
        
        
    


PHP Code Sniffer

PHP Code sniffer (phpcs) is a style checker. If you’ve ever used a linter (jshint, pylint, checkstyle, etc) you already know what it does. phpcs can check for indentation, missing comments, naming conventions, etc.

PHP Code sniffer ships with various popular PHP stylessuch as PEAR, PSR2 and Zend among others. We can also make our own rules or mix and match checks from existing ones.

The typical invocation goes:

$ phpcs FILE_OR_DIR --standard=STANDARD_NAME
$ phpcs FILE_OR_DIR --report-full --standard=PEAR
FILE: app/Providers/RouteServiceProvider.php
-----------------------------------------------------------------------------------------------------
FOUND 7 ERRORS AFFECTING 7 LINES
-----------------------------------------------------------------------------------------------------
  2 | ERROR | [ ] Missing file doc comment
  8 | ERROR | [ ] Missing doc comment for class RouteServiceProvider
 55 | ERROR | [x] Object operator not indented correctly; expected 12 spaces but found 13
 56 | ERROR | [x] Object operator not indented correctly; expected 12 spaces but found 13
 69 | ERROR | [x] Object operator not indented correctly; expected 12 spaces but found 13
 70 | ERROR | [x] Object operator not indented correctly; expected 12 spaces but found 13
 71 | ERROR | [x] Object operator not indented correctly; expected 12 spaces but found 13
-----------------------------------------------------------------------------------------------------
PHPCBF CAN FIX THE 5 MARKED SNIFF VIOLATIONS AUTOMATICALLY
-----------------------------------------------------------------------------------------------------

PHP Code Sniffer also includes phpcbf, a program than can automatically fix some problems.

$ phpcbf FILE_OR_DIR --report-full --standard=PEAR

PHPCBF RESULT SUMMARY
-------------------------------------------------------------------
FILE                                               FIXED  REMAINING
-------------------------------------------------------------------
app/Providers/RouteServiceProvider.php               5      2
app/Providers/BroadcastServiceProvider.php           3      5
app/Http/Middleware/Authenticate.php                 1      4
app/Http/Middleware/RedirectIfAuthenticated.php      3      6
app/Http/Controllers/UserController.php              10     20
app/Http/Controllers/Auth/RegisterController.php     8      9
app/Services/UserService.php                         9      22
app/Exceptions/Handler.php                           3      7
app/Console/Kernel.php                               2      4
-------------------------------------------------------------------
A TOTAL OF 44 ERRORS WERE FIXED IN 9 FILES
-------------------------------------------------------------------

Time: 201ms; Memory: 8MB
PHP Copy Paste Detector

PHP Copy Paste Detector (phpcpd) does what it says on the tin: finds duplicate code inside your project.

Having duplicate code usually signals the need for refactoring, the repeated parts should find a new home in a shared library or component. Duplicates also force developers to make shotgun surgery: a single change must be repeated multiple times.

Basic usage:

$ phpcpd FILE_OR_DIR

We can tell phpcpd how many lines must be repeated to be considered an error:

$ phpcpd src --min-lines=40
phpcpd 4.1.0 by Sebastian Bergmann.

Found 1 clones with 45 duplicated lines in 2 files:

  - src/Controller/PagesController.php:32-77 (45 lines)
    src/Controller/Component/PermissionsComponent.php:9-54

1.14% duplicated lines out of 3950 total lines of code.
Average size of duplication is 45 lines, largest clone has 45 of lines

Time: 39 ms, Memory: 6.00MB
Unit testing: phpunit

Unit testing ensures that our implementation does what it has been designed to do. Units are the smallest testable pieces of code, e.g. a class method, a function, an API call.

Unit tests also act as a form of living documentation, by reading what they do we can infer how the tested parts should work, what inputs do they take and what outputs should them provide. They also validate that code still valid after refactoring.

As new code is being written, we should also be creating tests to validate its behavior.

  • We’ll be using phpunit, the most popular testing framework for PHP, to drive our test cases.

After our tests are in place, we call phpunit to get an error report:

$ phpunit
PHPUnit 7.5.2 by Sebastian Bergmann and contributors.

..F.                                                                4 / 4 (100%)

Time: 1.04 seconds, Memory: 18.00MB

There was 1 failure:

1) Tests\Unit\UserServiceTest::testItCanUpdateUser
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'updated name'
+'updatedx name'

tests/Unit/UserServiceTest.php:45

FAILURES!
Tests: 4, Assertions: 8, Failures: 1.
Browser tests: Laravel Dusk

PHPUnit’s biggest problem is its inability to test javascript on the frontend. Dusk is a browser automation tool that overcomes this limitation by testing the application on an actual browser.

Dusk interfaces with a real Chrome browser to programatically browse sites, perform actions, select elements and do assertions.

In order to test with Dusk, we need to start our application with Laravel’s artisan tool:

$ php artisan serve &
$ php artisan dusk
PHPUnit 7.5.2 by Sebastian Bergmann and contributors.

F..                                                                 3 / 3 (100%)

Time: 11.34 seconds, Memory: 20.00MB

There was 1 failure:

1) Tests\Browser\LoginTest::testUserCanLogIn
Did not see expected text [Welcome, Test Account] within element [body].
Failed asserting that false is true.

vendor/laravel/dusk/src/Concerns/MakesAssertions.php:173
vendor/laravel/dusk/src/Concerns/MakesAssertions.php:144
tests/Browser/LoginTest.php:33
vendor/laravel/dusk/src/Concerns/ProvidesBrowser.php:67
tests/Browser/LoginTest.php:34

FAILURES!
Tests: 3, Assertions: 4, Failures: 1.
Security tests: Sensiolabs

With SensioLabs security checker, we can scan our project dependencies for known vulnerabilities. It scans our composer file for dependencies and runs them down through a vulnerabilities database:

$ php security-checker security:check ../composer.lock

Symfony Security Check Report
=============================

No packages have known vulnerabilities.
Running Continuous Integration with Semaphore

Continuous Integration (CI) allows to test early and test often.

We can set up a CI pipeline to build the application on every push. The pipeline can drive the tests and optionally deploy the application.

Semaphore is a cloud hosted continuous integration and delivery service. It’s easy to use, really fast and there is no need to install any software, manage any servers or maintain any systems. Semaphore fully supports Linux and macOS applications. The best thing is we can setup the whole process from a single config file.

Getting started with Semaphore is a breeze: first create an account on semaphoreci.com We can login with our GitHub account and Semaphore will have access to the repositories. If you don’t have any repositories you may fork Semaphore’s PHP Laravel Demo.

To create a project click on Projects -> New…. Semaphore will show a list of our GitHub repos. Click on the “Add Repository” button to get started.

Alternatively we create our project with the command line tool. To install it, click on the little cursor icon on the upper right side. Open the Install sem CLI & connect section and copy/paste the commands on your machine:

# install sem cli script
$ curl https://storage.googleapis.com/sem-cli-releases/get.sh | bash
# connect to your account
$ sem connect YOUR_ACCOUNT_NAME.semaphoreci.com SECRET

Once connected, cd into the local copy of your project and:

$ sem init

If we haven’t used Semaphore before, a sample config will be automatically created on .semaphore/semaphore.yml to get you started. After making a push we should see the pipeline running in our dashboard.

The Semaphore pipeline

The semaphore file is found at .semaphore/semapore.yml. This is the configuration we’ll be using:

version: v1.0
name: Semaphore PHP Example Pipeline

agent:
  machine:
    type: e1-standard-2
    os_image: ubuntu1804

blocks:
  - name: "Install Dependencies"
    task:
      env_vars:
        - name: APP_ENV
          value: prod
      jobs:
        - name: composer
          commands:
            - checkout
            - cache restore composer-$SEMAPHORE_GIT_BRANCH-$(checksum composer.lock),composer-$SEMAPHORE_GIT_BRANCH,composer-master
            - composer install
            - cache store composer-$SEMAPHORE_GIT_BRANCH-$(checksum composer.lock) vendor
            - cp .env.example .env
            - php artisan key:generate
        - name: npm
          commands:
            - checkout
            - cache restore node-modules-$SEMAPHORE_GIT_BRANCH-$(checksum package-lock.json),node-modules-$SEMAPHORE_GIT_BRANCH,node-modules-master
            - npm install
            - cache store node-modules-$SEMAPHORE_GIT_BRANCH-$(checksum package-lock.json),node-modules-$SEMAPHORE_GIT_BRANCH,node-modules-master node_modules

  - name: "Run Code Analysis"
    task:
      prologue:
        commands:
          - checkout
          - cache restore composer-$SEMAPHORE_GIT_BRANCH-$(checksum composer.lock),composer-$SEMAPHORE_GIT_BRANCH,composer-master
      jobs:
        - name: phpmd
          commands:
            - php vendor/bin/phpmd app/ text phpmd_ruleset.xml
        - name: phpcs
          commands:
            - php vendor/bin/phpcs app --report-full --standard=PSR2
        - name: phpcpd
          commands:
            - curl -L https://phar.phpunit.de/phpcpd.phar -o phpcpd.phar
            - php phpcpd.phar app/ --min-lines=50

  - name: "Run Unit tests"
    task:
      jobs:
      - name: phpunit
        commands:
          - checkout
          - cache restore composer-$SEMAPHORE_GIT_BRANCH-$(checksum composer.lock),composer-$SEMAPHORE_GIT_BRANCH,composer-master
          - ./vendor/bin/phpunit

  - name: "Run Browser tests"
    task:
      jobs:
        - name: laravel dusk
          commands:
            - checkout
            - cp .env.example .env
            - touch database/database.sqlite
            - cache restore composer-$SEMAPHORE_GIT_BRANCH-$(checksum composer.lock),composer-$SEMAPHORE_GIT_BRANCH,composer-master
            - php artisan key:generate
            - php artisan serve --env=dusk.local &
            - php artisan dusk

  - name: "Run Security Tests"
    task:
      jobs:
        - name: sensiolabs
          commands:
            - checkout
            - git clone https://github.com/sensiolabs/security-checker.git
            - cd security-checker
            - composer install
            - php security-checker security:check ../composer.lock

Let us walk through a pipeline that includes all the tools we have discussed so far.

Naming the pipeline

At the beginning we have the Semaphore version (v1.0) and the name for our pipeline.

version: v1.0
name: My Awesome PHP Laravel app

Selecting a server and OS

Next we define the agent. The agent is the environment in which our code will run, which includes virtual machine and operating system. The machine type sets the virtual machine type to be provisioned and os_image its operating system. Semaphore automatically provisions machines on demand.

Here we’re using e1-standard-2 machine (2 vCPUs, 4GB, 25GB disk) paired with an Ubuntu 18.04 LTS image.

agent:
  machine:
    type: e1-standard-2
    os_image: ubuntu1804

Blocks, tasks and jobs

Now we have arrived at the heart of the pipeline: blockstasks and jobs.

A pipeline is made of blocks. Blocks can have a name and must contain a task. A task contain jobs, and jobs are just a list of commands to execute.

Blocks are started sequentially, one after the other. Within a block, jobs are executed in parallel. Each block only starts after all the jobs on the previous blocks have finished.

Install dependencies

First things first, we need to install all our dependencies or we won’t get anywhere.

Fortunately Semaphore’s Ubuntu image includes php, composer and npm to handle packages.

Let’s see how the first block looks:

blocks:
  - name: "Install Dependencies"
    task:
      env_vars:
        - name: APP_ENV
          value: prod
      jobs:
        - name: composer
          commands:
            - checkout
            - composer install            
            - cache store composer-$SEMAPHORE_GIT_BRANCH-$(checksum composer.lock) vendor            
            - cp .env.example .env
            - php artisan key:generate
        - name: npm
          commands:
            - checkout
            - cache restore node-modules-$SEMAPHORE_GIT_BRANCH-$(checksum package-lock.json),node-modules-$SEMAPHORE_GIT_BRANCH,node-modules-master
            - npm install
            - cache store node-modules-$SEMAPHORE_GIT_BRANCH-$(checksum package-lock.json),node-modules-$SEMAPHORE_GIT_BRANCH,node-modules-master node_modules

Lots of things are happening here:

  • The env variable APP_ENV is set to “prod”, this is applied to all jobs on the task.
  • The code is cloned from our GitHub repo with checkout.
  • composer install and npm install handles the PHP and Javascript dependencies installations.
  • cache is being used to persist files between jobs.

We need to use cache to store and retrieve files between job executions.

To store files we use:

$ cache store KEYS FILE_OR_DIR

The files or directories are associated to a KEY or comma-separated list of KEYS

To retrieve them:

$ cache retrieve KEY

In our example pipeline, we’re storing the our dependencies under many key names. This helps use find them later.

Code analysis

The second block runs all our code analysis.

Since the tools don’t actually execute our application, we can run all of them in parallel and save us some precious time.

- name: "Run Code Analysis"
  task:
    prologue:     
      commands:
        - checkout
        - cache restore composer-$SEMAPHORE_GIT_BRANCH-$(checksum composer.lock),composer-$SEMAPHORE_GIT_BRANCH,composer-master
    jobs:
      - name: phpmd
        commands:          
          - php vendor/bin/phpmd app/ text phpmd_ruleset.xml
      - name: phpcs
        commands:          
          - php vendor/bin/phpcs app --report-full --standard=PSR2
      - name: phpcpd
        commands:          
          - curl -L https://phar.phpunit.de/phpcpd.phar -o phpcpd.phar
          - php phpcpd.phar app/ --min-lines=50

We’re taking advantage of the prologue feature. Commands in the prologue and epilogue sections are executed before and after each job, respectively.

We then define a job for each tool: phpmd, phpcs and phpcpd. The first two were installed by composer on the first block, whereas phpcd is downloaded from the website directly.

Unit tests

The fourth block executes the unit tests:

- name: "Run Unit tests"
  task:
    jobs:
    - name: phpunit
      commands:
        - checkout
        - cache restore composer-$SEMAPHORE_GIT_BRANCH-$(checksum composer.lock),composer-$SEMAPHORE_GIT_BRANCH,composer-master        
        - ./vendor/bin/phpunit

Nothing new here. Do you see the pattern? checkout to get the code and cache restore to get the dependencies. Then execute the tests.

Browser tests

We’ll continue our round of tests with Laravel dusk:

- name: "Run Browser tests"
  task:
    jobs:
      - name: laravel dusk
        commands:
          - checkout
          - cp .env.example .env
          - touch database/database.sqlite
          - cache restore composer-$SEMAPHORE_GIT_BRANCH-$(checksum composer.lock),composer-$SEMAPHORE_GIT_BRANCH,composer-master          
          - php artisan key:generate          
          - php artisan serve --env=dusk.local &          
          - php artisan dusk

This job is a bit longer because we need to set up a few things beforehand.

Our application uses a database, Semaphore supports many database services out of the box, so we could choose to use one of them. However, to keep things simple, we can get away with an sqlite db, so lets do that.

We use php artisan serve to start application and the browser testing is done with php artisan dusk

Did you notice that we didn’t install any browsers? That’s because Semaphore’s OS images already include several browsers..

Security tests

And for the final round of tests we’ll do a quick security checkup using sensiolabs:

- name: "Run Security Tests"
  task:
    jobs:
      - name: sensiolabs
        commands:
          - checkout          
          - git clone https://github.com/sensiolabs/security-checker.git
          - cd security-checker          
          - composer install          
          - php security-checker security:check ../composer.lock

You know the drill by now, checkout then cache restore. Then we clone the security checker code, install additional dependencies and run the security test.

Let the code flow

To get the pipeline running, make a push to the repository. Semaphore will pick it up and automatically start driving the pipeline.

We can click on any individual job to read its log.

If any job fails to run, we can easily hop into its session to snoop around. Click on the debug button on the upper right side of the log.

Semaphore gives us a command to ssh into the job session:

$ sem debug job UUID
Wrap up

With great continuous integration tools for PHP working well together, we can focus on our code with a peace of mind that code quality is ensured.

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