thinkphp/library/think/db/connector/Mysql.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\connector;

use PDO;
use think\db\Connection;
use think\db\Query;

/**
 * mysql数据库驱动
 */
class Mysql extends Connection
{

    protected $builder = '\\think\\db\\builder\\Mysql';

    /**
     * 初始化
     * @access protected
     * @return void
     */
    protected function initialize()
    {
        // Point类型支持
        Query::extend('point', function ($query, $field, $value = null, $fun = 'GeomFromText', $type = 'POINT') {
            if (!is_null($value)) {
                $query->data($field, ['point', $value, $fun, $type]);
            } else {
                if (is_string($field)) {
                    $field = explode(',', $field);
                }
                $query->setOption('point', $field);
            }

            return $query;
        });
    }

    /**
     * 解析pdo连接的dsn信息
     * @access protected
     * @param  array $config 连接信息
     * @return string
     */
    protected function parseDsn($config)
    {
        if (!empty($config['socket'])) {
            $dsn = 'mysql:unix_socket=' . $config['socket'];
        } elseif (!empty($config['hostport'])) {
            $dsn = 'mysql:host=' . $config['hostname'] . ';port=' . $config['hostport'];
        } else {