A trait to handle user setting arrays in your classes

example_usage.php

<?php
class SettingTest {
    use \MyProject\Behaviours\Settings;

    public function __construct (array $settings = array()) {
        $this->loadSettings($settings);
    }
}

$settingTest = new SettingTest(
    array (
        "schemaPath" => "schema.xml",
        "api" => array (
            "basePath" => "api"
        ),
        "admin" => array (
            "basPath" => "admin"
        ),
        "auth" => array (
            "method" => "simple",
            "model" => "user",
            "username_field" => "name",
            "password_field" => "password"
        )
    )
);

$settingTest->applySetting("auth:validation:username","email");

echo "Authentication method: " . $settingTest->setting("auth:method");
echo "username validation: " . $settingTest->setting("auth:validation:username"));

Settings.php

<?php
namespace MyProject\Behaviours;

trait Settings {

    protected $settings;

    public function loadSettings (array $settingsArray = array()) {
        $this->settings = $settingsArray;
    }

    public function setting ($settingName) {
        $settingRoute = explode(':',$settingName);
        $setting = $this->settings;
        foreach($settingRoute as $routePart) {
            if(isset($setting[$routePart])) {
                $setting = $setting[$routePart];
            } else {
                return NULL;
            }
        }
        return $setting;
    }

    public function applySetting($settingName, $settingValue) {
        $settingRoute = explode(':',$settingName);
        $this->apply($settingRoute,$this->settings, $settingValue);
    }

    public function fetchAllSettings () {
        return $this->settings;
    }

    private function apply($route,&$setting, $value) {
        if(count($route) > 1) {
            $routePart = array_shift($route);
            if(!isset($setting[$routePart])) {
                $setting[$routePart] = array ();
            }
            $this->apply($route, $setting[$routePart], $value);
        } else {
            $setting[$route[0]] = $value;
        }
    }

}