I recently started programming in PHP using the well-known Symfony framework. I wanted to keep my VS Code habits and proficiency I had from my previous projects in Node.js, so I tried to configure VS Code for PHP development as well. Moreover, I didn't want to invest €199 in the famous PHPStorm IDE... 😕

TL;DR

VS Code extensions you should install and configure for PHP development:

In this article, I will explain how I managed to make my development environment comparable to PhpStorm's. The commands will be detailed for Ubuntu 18.04, but they can be adapted for Mac OS and possibly for Windows.

I will take an empty Symfony application as an example for this article. Let's start!

Prerequisites

Install PHP and Composer

To be able to run PHP code you obviously need to install PHP. You will also probably need Composer, a commonly used dependency manager for PHP. You can install them by running the following command:

sudo apt install php-cli composer

You can install php-all-dev instead of php-cli if you want to install some useful libraries as well.

Create an empty Symfony project

Let's now create an empty Symfony app. Then open VS Code and launch the development server:

composer create-project symfony/website-skeleton my-symfony-website
cd my-symfony-website
code .
bin/console server:run

Increase the number of system watchers if needed

VS Code needs to watch for file changes to work correctly. That's why the following warning may appear because our Symfony project contains a lot of files:

To fix it, you can run the following commands in your terminal, and then restart VS Code:

echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf
sudo sysctl -p

Go to http://127.0.0.1:8000 from your favorite web browser and check that your Symfony website works.

Configure VS Code

Autocomplete & Intellisense & Go to definition

Let's create a new route in our application. Just add an empty file HelloWorldController.php in the src/Controller folder.

Install PHP Intelephense

By default, VS Code provides some basic code suggestions but they are generic and quite useless. To get useful code suggestions as you type, I recommend installing the PHP Intelephense extension for VS Code. I also tried the PHP Intellisense extension but it's slower on big projects and provides fewer features (it doesn't gray out unused imports for example).

Now that the PHP Intelephense extension is installed, we can start writing our HelloWorldController!

As you can see, code suggestions are very relevant and VS Code auto imports the corresponding namespace when you validate a suggestion!

Disable basic suggestions

PHP Intelephense can also auto-suggest relevant methods when typing $myVar->. The problem is that these suggestions are polluted by the default PHP suggestions.

Basic PHP code suggestions we want to disable

To fix that, you can disable these basic suggestions in VS Code settings. Simply open VS Code's settings.json file (press Ctrl + , then click on the top right {} icon) and add the following line:

  "php.suggest.basic": false,

When it's done, you can see useful suggestions!

Relevant suggestions when basic suggestions are disabled

Enable autocomplete in comments / annotations

When you write PHP code, a good practice is to add PHPDoc annotations to make your code more understandable and to help your IDE provide you with relevant code suggestions. By default, VS Code doesn't suggest anything while writing annotations. To activate code suggestions in comments, open the settings.json file and add the following line:

"editor.quickSuggestions": { "comments": true },
Code suggestions in annotations

Allow autocomplete in tests

By default (I don't know why to be honest 😕), PHP Intelephense excludes test folders. This behavior is specified in the default settings:

"intelephense.files.exclude": [
  "**/.git/**",
  "**/.svn/**",
  "**/.hg/**",
  "**/CVS/**",
  "**/.DS_Store/**",
  "**/node_modules/**",
  "**/bower_components/**",
  "**/vendor/**/{Test,test,Tests,tests}/**"
],
Default PHP Intelephense exclude settings

To enable suggestions for tests, all you need to do is edit your settings.json file and add:

"intelephense.files.exclude": [
  "**/.git/**",
  "**/.svn/**",
  "**/.hg/**",
  "**/CVS/**",
  "**/.DS_Store/**",
  "**/node_modules/**",
  "**/bower_components/**"
],

The result 😉:

Code completion enabled for tests

Go to definition

When you want to get more information about a function, you can Ctrl+Click on it and VS Code will open the line where the function is declared!

Generate getters and setters for class properties

If you want VS Code to generate getters and setters for you, you can install this extension. Then, right-click on a class property and select Insert PHP Getter & Setter.

Generate getter and setter

Debugging

Debugging your PHP code can be painful without a debugger. You can use dump($myVar); die(); (😕) but it's not very convenient...

The best way to debug your PHP code is to use Xdebug, a profiler and debugger tool for PHP.

Install Xdebug

Xdebug is not shipped with PHP, you need to install it on your development environment:

sudo apt install php-xdebug

Then run sudo nano /etc/php/7.2/mods-available/xdebug.ini and add the following lines:

xdebug.remote_enable = 1
xdebug.remote_autostart = 1

Check that Xdebug is successfully installed by running php -v. You should get something like:

PHP 7.2.19-0ubuntu0.18.04.1 (cli) (built: Jun  4 2019 14:48:12) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies
    with Zend OPcache v7.2.19-0ubuntu0.18.04.1, Copyright (c) 1999-2018, by Zend Technologies
    with Xdebug v2.6.0, Copyright (c) 2002-2018, by Derick Rethans

Configure VS Code debugger to listen for Xdebug

To be able to use Xdebug in VS Code, you need to install the PHP debug extension.

Then go to the debug tab in VS Code (accessible in the side menu) and click on Add configuration. Select PHP, and close the newly created launch.json file:

Configure VS Code debugger to listen for Xdebug

Your debugging environment is now ready! 🕷🚀

Debug your code with VS Code

Let's debug our HelloWorldController.php to see which are the query parameters given by the user. You can use the following code for example:

<?php

namespace App\Controller;

use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;

class HelloWorldController
{
    /**
     * @Route("/hello")
     */
    public function getHelloWorld(Request $request)
    {
        $name = $request->get('name');

        return new Response('Hello '.$name.'!');
    }
}

Press F5 in VS Code to start the debugging session.

Uncheck the Everything option in the breakpoints list and put a breakpoint at line 18 by clicking left of the line number. Then go to http://127.0.0.1:8000/hello?name=Louis. You can now see the value of local variables by hovering the mouse pointer over them:

Request to http://127.0.0.1:8000/hello?name=Louis paused in debugger

You can do a lot of amazing things with the debugger 😃, like:

  • adding or removing breakpoints
  • stepping over, into or out
  • watching variables
  • evaluating expressions in the debug console

For more information about the power of VS Code debugger, you can visit https://code.visualstudio.com/docs/editor/debugging.

When you encounter an error, or when you use the Symfony debug toolbar or the profiler, you may want to open the desired file directly in your IDE with the cursor at the corresponding line.

To be able to do that, you need to add the following line to your /etc/php/7.2/mods-available/xdebug.ini:

xdebug.file_link_format = vscode://file/%f:%l
Tip! If you run PHP in a Docker container, you can specify a path mapping between your host and your docker like this:
xdebug.file_link_format = 'vscode://file/%f:%l&/path/to/app/in/docker/>/path/to/app/on/host/'

Now, when an error occurs, you can click on it and go directly to the corresponding line in VS Code:

When you visit a route, you can also jump to the corresponding controller by clicking on the debugging toolbar:

Formatting & linting

Formatting and linting your code is a very good practice to keep it clean automatically, and to inform you about some errors.

PHP CS Fixer

The best and commonly used linter for PHP is PHP CS Fixer. It provides a large number of rules to keep your code clean. You can visit this website for more information about the rules and the categories they belong to.

Integrate PHP CS Fixer into VS Code

To be able to auto-format your PHP files in VS Code, you need to install the php cs fixer extension.

The most complete and safe category of rules is @PhpCsFixer. It's a good point to start. To enable this set of rules in VS Code, open settings.json and add the following line:

"php-cs-fixer.rules": "@PhpCsFixer",

To auto-format your PHP files on save, you also need to add the following lines to your settings.json:

"[php]": {
  "editor.defaultFormatter": "junstyle.php-cs-fixer",
  "editor.formatOnSave": true
},
Auto-format on save with PHP CS Fixer

PHP CS Fixer config file

If you want to disable or enable some specific linting rules, you can do it in a .php_cs file at the root folder of your project. If this configuration file is present, VS Code takes it into account and overrides the configuration found in settings.json. You can find more information about the .php_cs file in the GitHub repository. A simple config file to use @PhpCsFixer category and disable some rules could be:

<?php

return PhpCsFixer\Config::create()
    ->setRules([
        '@PhpCsFixer' => true,
        'php_unit_internal_class' => false,
        'php_unit_test_class_requires_covers' => false,
    ])
;

Bonus: add Prettier to PHP CS Fixer

Prettier for PHP is a code formatter which makes some improvements that PHP CS Fixer does not do. It allows you, among other things, to configure a max line length and makes your code even cleaner.

To add Prettier for PHP to your PHP CS Fixer configuration, you can follow these instructions.

In case of issues with format on save

Depending on your computer's speed, the length of your files and the number of rules you activate, linting a file on save can be slow, causing VS Code to refuse it. To fix this behavior, change the formatOnSaveTimeout in your settings.json:

"editor.formatOnSaveTimeout": 1500,

Twig support

To activate syntax highlighting for Twig files in VS Code, you need to install the Twig Language 2 extension.

To enable emmet suggestions like in HTML files, add the following line to your settings.json:

"emmet.includeLanguages": { "twig": "html" },

Database management

A good VS Code extension to manage your databases is SQLTools. Feel free to install it and manage your databases directly from your IDE!

Enjoy coding in PHP with VS Code 🚀 and feel free to give me your feedback! 😉