PHPCS + Atom (Ubuntu)

1. Install PHPCS:

Check if phpcs is installed:

phpcs -i
(out)Command 'phpcs' not found, but can be installed with:
(out)sudo apt install php-codesniffer

Install it globally:

composer global require squizlabs/php_codesniffer

Get the phpcs binary path:

composer global config bin-dir --absolute
(out)Changed current directory to /home/daniel/.config/composer

Add it to your PATH, by editing ~/.profile and adding these lines at the bottom:

export PATH=/home/daniel/.config/composer/vendor/bin:$PATH

Now, you need to do a logout/login. Closing and opening the shell won’t work. You could run a “source ~/.profile”, but it would work just for the opened shell. So, do the logout/login.

2. Check installed coding styles:

After logout/login, check if it is installed:

phpcs -i
(out)The installed coding standards are Squiz, PHPCS, Zend, PSR1, PSR2, PEAR and MySource

3. Install phpcodesniffer-composer-installer:

This package is a life-saver. Without it, you need to manually set up paths, which can lead to accidental misconfigurations and overwriting.

composer global require --dev dealerdirect/phpcodesniffer-composer-installer

4. [Optional] Install extra coding styles system-wide: WordPress, Joomla, etc:


composer global require wp-coding-standards/wpcs:*

It is also recommended to install the PHPCompatibilityWP package too:

composer global require --dev phpcompatibility/phpcompatibility-wp:*

WordPress VIP:

composer global require --dev automattic/vipwpcs:*


If you get this error: “Could not find a version of package joomla/coding-standards matching your minimum-stability (stable). Require it with an explicit version constraint allowing its desired stability.“, decrease your stability requirements to dev.

composer global config minimum-stability dev
composer global require --dev joomla/coding-standards:*
composer global config minimum-stability stable

Check installed rules:

phpcs -i
(out)The installed coding standards are Squiz, Zend, PSR1, PSR2, PEAR, MySource, PSR12, PHPCompatibility, Joomla, Joomla-CMS, Joomla-Stats, PHPCompatibilityParagonieRandomCompat, PHPCompatibilityParagonieSodiumCompat, PHPCompatibilityWP, WordPress-VIP-Go, WordPressVIPMinimum, WordPress-Docs, WordPress, WordPress-Core and WordPress-Extra

4. Get the bin path:

which phpcs

In this example, the bin path is /home/daniel/.config/composer/vendor/bin/phpcs.

5. In Atom, install linter-phpcs package:

In Atom, install package linter-phpcs by AtomLinter:
Ctrl+Shift+P > Install Packages and Themes > linter-phpcs

Install any dependency (if required)

Disable linter. I know, we have just installed it as a dependency:

Click on Settings to configure linter-phpcs:

Set the bin path and the coding standard you want to use:

And that’s it. Now you will see hints / warnings to improve your code :)

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