multiple has get

Config.php

<?php
/**
 *
 */

namespace Mvc5\Config;

trait Config
{
    /**
     * @param array|string $name
     * @return mixed
     */
    function get($name)
    {
        if (is_string($name)) {
            return is_array($this->config) ? ($this->config[$name] ?? null) : $this->config[$name];
        }

        $matched = [];

        foreach($name as $key) {
            null !== ($value = $this->config[$key] ?? null)
                && $matched[$key] = $value;
        }

        return $matched;
    }

    /**
     * @param array|string $name
     * @return bool
     */
    function has($name) : bool
    {
        if (is_string($name)) {
            return isset($this->config[$name]);
        }

        foreach($name as $key) {
            if (!isset($this->config[$key])) {
                return false;
            }
        }

        return true;
    }
}

ConfigTest.php

<?php
/**
 *
 */

namespace Mvc5\Test\Config;

class ConfigTest
    extends TestCase
{
    /**
     *
     */
    function test_get_multiple()
    {
        $config = new Config(['foo' => 'bar', 'baz' => 'bat']);

        $this->assertEquals(['foo' => 'bar', 'baz' => 'bat'], $config->get(['foo', 'foobar', 'baz']));

        $config = new Config(new Config(['foo' => 'bar', 'baz' => 'bat']));

        $this->assertEquals(['foo' => 'bar', 'baz' => 'bat'], $config->get(['foo', 'foobar', 'baz']));
    }
  

    /**
     *
     */
    function test_has_multiple()
    {
        $config = new Config(['foo' => 'bar', 'baz' => 'bat']);

        $this->assertTrue($config->has(['foo', 'baz']));
        $this->assertFalse($config->has(['foo', 'foobar', 'baz']));

        $config = new Config(new Config(['foo' => 'bar', 'baz' => 'bat']));

        $this->assertTrue($config->has(['foo', 'baz']));
        $this->assertFalse($config->has(['foo', 'foobar', 'baz']));
    }  
}