woocommerce/docs/quality-and-best-practices/naming-conventions.md

post_title	menu_title	tags
Naming conventions	Naming conventions	reference

PHP

WooCommerce core generally follows WordPress PHP naming conventions.

There are some additional conventions that apply, depending on the location of the code.

/src

Classes defined inside /src follow the PSR-4 standard. See the README for /src for more information.

The following conventions apply to this directory:

• No class name prefix is needed, as all classes in this location live within the Automattic\WooCommerce namespace.
• Classes are named using CamelCase convention.
• Functions are named using snake_case convention.
• Class file names should match the class name. They do not need a class- prefix.
• The namespace should match the directory structure.
• Hooks are prefixed with woocommerce_.
• Hooks are named using snake_case convention.

For example, the class defined in src/Util/StringUtil.php should be named StringUtil and should be in the Automattic\WooCommerce\Util namespace.

/includes

The /includes directory contains legacy code that does not follow the PSR-4 standard. See the README for /includes for more information.

The following conventions apply to this directory:

• Class names are prefixed with WC_.
• Classes are named using Upper_Snake_Case convention.
• Functions are prefixed with wc_.
• Functions are named using snake_case convention.
• Hooks are prefixed with woocommerce_.
• Hooks are named using snake_case convention.

Class name examples:

• WC_Cache_Helper
• WC_Cart

Function name examples:

• wc_get_product()
• wc_is_active_theme()

Hook name examples (actions or filters):

• woocommerce_after_checkout_validation
• woocommerce_get_formatted_order_total

JS

WooCommerce core follows WordPress JS naming conventions.

As with PHP, function, class, and hook names should be prefixed, but the convention for JS is slightly different.

• Global class names are prefixed with WC. Class names exported from modules are not prefixed.
• Classes are named using UpperCamelCase convention.
• Global function names are prefixed with wc. Function names exported from modules are not prefixed.
• Functions are named using camelCase convention.
• Hooks names are prefixed with woocommerce.
• Hooks are named using camelCase convention.

Global class name example:

• WCOrdersTable

Global function name example:

• wcSettings()

Hook name example (actions or filters):

• woocommerceTracksEventProperties

CSS and SASS

See CSS/Sass Naming Conventions.