thinkphp/library/think/db/Where.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think\db;

use ArrayAccess;

class Where implements ArrayAccess
{
    /**
     * 查询表达式
     * @var array
     */
    protected $where = [];

    /**
     * 是否需要增加括号
     * @var bool
     */
    protected $enclose = false;

    /**
     * 创建一个查询表达式
     *
     * @param  array    $where      查询条件数组
     * @param  bool     $enclose    是否增加括号
     */
    public function __construct(array $where = [], $enclose = false)
    {
        $this->where   = $where;
        $this->enclose = $enclose;
    }

    /**
     * 设置是否添加括号
     * @access public
     * @param  bool $enclose
     * @return $this
     */
    public function enclose($enclose = true)
    {
        $this->enclose = $enclose;
        return $this;
    }

    /**
     * 解析为Query对象可识别的查询条件数组
     * @access public
     * @return array
     */
    public function parse()
    {