Public functions and classes should be prefixed with:

• fw_ for functions
• FW_ for classes

function fw_useful_function() {
    // ...
}

class FW_Useful_Class {
    // ...
}

Note

A Public function is meant to be used by anyone. Usually it’s a helper function that does something useful.

Private functions and classes should be prefixed with:

• _fw_ for functions
• _FW_ for classes

/**
 * @internal
 */
function _fw_private_function() {
    // ...
}

/**
 * @internal
 */
class _FW_Private_Class
{
    // ...
}

Note

A private function is used somewhere internally. Don’t forget to use the @internal tag in your PhpDoc in order to make it clear to other developers that this is a private function. It will also remove the function from your documentation (if you are using an automatic documentation generator)

Functions and methods used for hooks should be prefixed with:

• _action_ for add_action()
• _filter_ for add_filter()

/**
 * @internal
 */
function _action_init_something() {
    // ...
}
add_action('init', '_action_init_something');

Important

Be sure the function name is unique enough in order to minimize the chances to be defined by someone else. Do not use too simple function names like _action_init.

class FW_Example
{
    public function __construct()
    {
        add_filter('the_content', array($this, '_filter_the_content'));
    }

    /**
     * @internal
     */
    public function _filter_the_content($content) {
        // ...

        return $content;
    }
}

Filters and actions should be prefixed with 'fw_'.

$data = apply_filters('fw_whatever', $data);

do_action('fw_whatever');

Public functions and classes should be prefixed with:

• fw_theme_ for functions
• FW_Theme_ for classes

function fw_theme_head() {
    // ...
}

class FW_Theme_Pagination
{
    // ...
}

Private functions and classes should be prefixed with:

• _fw_theme_ for functions
• _FW_Theme_ for classes

/**
 * @internal
 */
function _fw_theme_private_function() {
    // ...
}

/**
 * @internal
 */
class _FW_Theme_Private_Class
{
    // ...
}

Functions used for hooks should be prefixed with:

• _action_theme_ for add_action()
• _filter_theme_ for add_filter()

/**
 * @internal
 */
function _filter_theme_the_content($content) {
    // ...

    return $content;
}
add_filter('the_content', '_filter_theme_the_content');

/**
 * @internal
 */
function _action_theme_init() {
    // ...
}
add_action('init', '_action_theme_init');

Filters and actions should be prefixed with fw_theme_.

$data = apply_filters('fw_theme_whatever', $data);

do_action('fw_theme_whatever');

Public functions and classes should be prefixed with:

• fw_ext_<extension-name>_ for functions
• FW_Ext_<extension-name>_ for classes

Private functions and classes should be prefixed with:

• _fw_ext_<extension-name>_ for functions
• _FW_Ext_<extension-name>_ for classes

Functions used for hooks should be prefixed with:

• _action_fw_ext_<extension-name>_ for add_action()
• _filter_fw_ext_<extension-name>_ for add_filter()

For e.g. if extension name is demo:

/**
 * @internal
 */
function _filter_fw_ext_demo_the_content($content) {
    // ...

    return $content;
}
add_filter('the_content', '_filter_fw_ext_demo_the_content');

/**
 * @internal
 */
function _action_fw_ext_demo_init() {
    // ...
}
add_action('init', '_action_fw_ext_demo_init');

Filters and actions should be prefixed with 'fw_ext_<extension-name>_'.

For e.g. if extension name is demo:

$data = apply_filters('fw_ext_demo_whatever', $data);

do_action('fw_ext_demo_whatever');