Jetpack Coding Standard

This is a package implementing phpcs sniffs for the Jetpack Coding Standard.

This standard is generally that of WordPress, with a few additions.

Usage

In your project's composer.json, add the following lines:

{
    "require-dev": {
        "dealerdirect/phpcodesniffer-composer-installer": "*",
        "automattic/jetpack-codesniffer": "^1"
    }
}

Your project must use the default composer vendor directory, vendor.

You should then include the Jetpack rules in your .phpcs.xml.dist, like

<rule ref="Jetpack" />

You will also likely want to set some configuration for other included rulesets:

<config name="minimum_supported_wp_version" value="6.6" />
<config name="testVersion" value="7.2-"/>

Included Standards

The Jetpack standard includes the following other standards:

• PHPCompatibilityWP
• WordPress-Core, WordPress-Docs, and WordPress-Extra
• VariableAnalysis
• Selected sniffs from MediaWiki

Per-dir Compatibility

This ruleset is intended to be used with PHPCompatibiity's testVersion set to 7.2-. If used with automattic/jetpack-phpcs-filter's per-directory configuration, you may run into a situation where a subdir wants to be compatible down to a later version, but as PHPCompatibiity uses <config> for testVersion the setting cannot be directly altered per directory.

To assist with this case, we provide additional rulesets that disable PHPCompatibility rules detecting issues that only apply to older versions:

• <rule ref="Jetpack-Compat-73" /> will disable rules detecting issues that only apply to PHP < 7.3.
• <rule ref="Jetpack-Compat-74" /> will disable rules detecting issues that only apply to PHP < 7.4.
• <rule ref="Jetpack-Compat-80" /> will disable rules detecting issues that only apply to PHP < 8.0.
• <rule ref="Jetpack-Compat-81" /> will disable rules detecting issues that only apply to PHP < 8.1.
• <rule ref="Jetpack-Compat-82" /> will disable rules detecting issues that only apply to PHP < 8.2.
• <rule ref="Jetpack-Compat-83" /> will disable rules detecting issues that only apply to PHP < 8.3.
• <rule ref="Jetpack-Compat-84" /> will disable rules detecting issues that only apply to PHP < 8.4.

Note this isn't a perfect replacement for raising testVersion, as it cannot add PHPCompatibility rules that do not trigger when testVersion indicates support for PHP 7.2. For example, Jetpack-Compat-74 disables the PHPCompatibility.Classes.NewTypedProperties.Found rule ("Typed properties are not supported in PHP 7.3 or earlier") but cannot enable more specific rules like PHPCompatibility.Classes.NewTypedProperties.UnionTypeFound ("Union types are not present in PHP version 7.4 or earlier") that would be triggered if testVersion were set to 7.4-.

You may also run into cases where certain subdirectories contain code that is not intended to run under WordPress. We provide additional rulesets to help with this situation as well:

• <rule ref="Jetpack-Compat-NoWP" /> will re-enable rules that PHPCompatibilityWP disables because WordPress provides polyfills for various functions.
• <rule ref="Jetpack-NoWP" /> includes Jetpack-Compat-NoWP and disables additional rules checking for use of WordPress-provided functions over PHP-native ones.
• <rule ref="Jetpack-Tests" /> will disable certain rules that do not make much sense in PHPUnit tests.