Example PHP Code Sniffer Configuration File for WordPress

phpcs.xml

<?xml version="1.0" ?>

<ruleset
        name="MyProject"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="https://raw.githubusercontent.com/squizlabs/PHP_CodeSniffer/master/phpcs.xsd"
>
    <description>My Project Coding Standard</description>

    <!-- Set the coding standard -->
    <rule ref="WordPress">
        <!-- Exclude specific rules -->
        <exclude name="Generic.Commenting.DocComment"/>
        <exclude name="Squiz.Commenting.ClassComment"/>
        <exclude name="Squiz.Commenting.FileComment"/>
        <exclude name="Universal.Operators.DisallowShortTernary"/>
        <exclude name="WordPress.Files.FileName"/>
        <exclude name="WordPress.PHP.YodaConditions"/>
        <exclude name="WordPress.Security.NonceVerification"/>
    </rule>

    <!-- Add the text domain -->
    <rule ref="WordPress.WP.I18n">
        <properties>
            <property name="text_domain" type="array">
                <element value="my-plugin"/>
            </property>
        </properties>
    </rule>

    <!-- Add custom capabilities -->
    <rule ref="WordPress.WP.Capabilities">
        <properties>
            <property name="custom_capabilities" type="array">
                <element value="manage_my_plugin"/>
            </property>
        </properties>
    </rule>

    <!-- Add custom sanitization functions -->
    <rule ref="WordPress.Security.ValidatedSanitizedInput">
        <properties>
            <property name="customSanitizingFunctions" type="array">
                <element value="my_plugin_clean_string"/>
            </property>
        </properties>
    </rule>

    <!-- Set the target directories -->
    <file>my-plugin.php</file>
    <file>includes</file>

    <!-- Set the excluded directories -->
    <exclude-pattern>./vendor/*</exclude-pattern>
    <exclude-pattern>./tests/*</exclude-pattern>

    <!-- Set the options -->
    <arg name="extensions" value="php,inc"/>
    <arg name="parallel" value="80"/>
    <arg name="cache" value=".phpcs.cache"/>
</ruleset>