回答我自己的问题，如果您的系统不是性能关键型的，您可以使用插件，例如User Role Editor:

它支持多站点、每个用户多个角色等。

或者，如果我要编写它：

如果我想完全控制它并编写我的自定义代码，我会在插件中处理角色管理，以使其有条理并在逻辑上与其余代码分离。

目前这种结构的主要优点是为角色提供一个专用文件夹，使其保持有序，并提供一个基本的OOP结构。这可以通过一些方法来扩展，例如，帮助分配自定义帖子类型功能等。

plugins/custom-roles-manager/custom-roles-manager.php

<?php
/*
 * Plugin Name:  Custom Roles Manager
 * Description:  This plugin handles roles capabilities.
 * Requires PHP: 5.3
 */
defined(\'ABSPATH\') OR exit;

/** Runs only when the plugin is activated */
register_activation_hook(__FILE__, \'custom_roles_manager_activate\');
function custom_roles_manager_activate()
{
    require_once(__DIR__ . \'/RoleInterface.php\');

    // This is the folder we add roles on
    $roles_folder = __DIR__ . \'/roles\';

    // If it throws anything, WordPress will automatically disable the plugin and show the notice
    $roles = crm_get_roles_in_folder($roles_folder);

    // Give developer a chance to filter the roles for any reason
    $roles = apply_filters(\'crm_get_roles\', $roles);

    foreach ($roles as $role) {
        // Filter might add $role that does not implement RoleInterface
        if ($role instanceof RoleInterface) {
            $role->add();
        } else {
            throw new Exception(\'All roles handled by Custom Roles Manager must implement RoleInterface interface.\');
        }
    }
}

/**
 * Returns an array of concrete classes that implements RoleInterface
 * in a given directory
 * 
 * @param $dir
 *
 * @return array
 * @throws ReflectionException
 */
function crm_get_roles_in_folder($dir)
{
    $roles = array();

    $roles_files = new RegexIterator(
        new DirectoryIterator($dir),
        \'/\\.php$/\',
        RegexIterator::MATCH
    );

    foreach ($roles_files as $role_file) {
        include_once($role_file->getPathname());
        $r = new ReflectionClass($role_file->getBasename(\'.php\'));
        if ($r->implementsInterface(RoleInterface::class)) {
            $roles[] = $r->newInstance();
        }
    }

    return $roles;
}

plugins/custom-roles-manager/RoleInterface.php

<?php

interface RoleInterface
{
    /**
     * Function that has to be implemented for
     * each concrete class to actually add the role.
     */
    public function add();
}

plugins/custom-roles-manager/roles/PublicRelationsRole.php

<?php

class PublicRelationsRole implements RoleInterface
{
    public function add()
    {
        add_role(
            \'public_relations\',
            __(\'Public Relations\'),
            [
                \'read\',
                \'edit_post\',
                \'publish_post\',
                \'delete_post\',
            ]
        );
    }
}

示例场景：创建“其他角色”

创建文件wp内容/插件/自定义角色管理器/角色/SomeOtherRole.phpRoleInterface 并创建add 方法，该方法调用add_role 来自WordPress的函数随着时间的推移，您的复杂角色系统将有一个专门的文件夹供他们使用，这有助于使用OOP使其保持有序，OOP提供了一些关于代码随时间重复使用的选项。