vendor/topthink/framework/src/think/View.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 think\helper\Arr;

/**
 * 视图类
 * @package think
 */
class View extends Manager
{

    protected $namespace = '\\think\\view\\driver\\';

    /**
     * 模板变量
     * @var array
     */
    protected $data = [];

    /**
     * 内容过滤
     * @var mixed
     */
    protected $filter;

    /**
     * 获取模板引擎
     * @access public
     * @param string $type 模板引擎类型
     * @return $this
     */
    public function engine(string $type = null)
    {
        return $this->driver($type);
    }

    /**
     * 模板变量赋值
     * @access public
     * @param string|array $name  模板变量
     * @param mixed        $value 变量值
     * @return $this
     */
    public function assign($name, $value = null)
    {
        if (is_array($name)) {
            $this->data = array_merge($this->data, $name);
        } else {