vendor/topthink/framework/src/think/Container.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2021 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace think;

use ArrayAccess;
use ArrayIterator;
use Closure;
use Countable;
use InvalidArgumentException;
use IteratorAggregate;
use Psr\Container\ContainerInterface;
use ReflectionClass;
use ReflectionException;
use ReflectionFunction;
use ReflectionFunctionAbstract;
use ReflectionMethod;
use think\exception\ClassNotFoundException;
use think\exception\FuncNotFoundException;
use think\helper\Str;
use Traversable;

/**
 * 容器管理类 支持PSR-11
 */
class Container implements ContainerInterface, ArrayAccess, IteratorAggregate, Countable
{
    /**
     * 容器对象实例
     * @var Container|Closure
     */
    protected static $instance;

    /**
     * 容器中的对象实例
     * @var array
     */
    protected $instances = [];

    /**
     * 容器绑定标识
     * @var array
     */
    protected $bind = [];

    /**
     * 容器回调
     * @var array
     */
    protected $invokeCallback = [];