vendor/overtrue/socialite/src/Config.php

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<?php

/*
 * This file is part of the overtrue/socialite.
 *
 * (c) overtrue <i@overtrue.me>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace Overtrue\Socialite;

use ArrayAccess;
use InvalidArgumentException;

/**
 * Class Config.
 */
class Config implements ArrayAccess
{
    /**
     * @var array
     */
    protected $config;

    /**
     * Config constructor.
     *
     * @param array $config
     */
    public function __construct(array $config)
    {
        $this->config = $config;
    }

    /**
     * Get an item from an array using "dot" notation.
     *
     * @param string $key
     * @param mixed  $default
     *
     * @return mixed
     */
    public function get($key, $default = null)
    {
        $config = $this->config;

        if (is_null($key)) {
            return $config;
        }
        if (isset($config[$key])) {
            return $config[$key];
        }
        foreach (explode('.', $key) as $segment) {
            if (!is_array($config) || !array_key_exists($segment, $config)) {
                return $default;
            }
            $config = $config[$segment];
        }