crm.clientright.ru/modules/Workflow2/extends/provider/MySQL.inc.php

<?php
/**
 * Created by JetBrains PhpStorm.
 * User: Stefan Warnat <support@stefanwarnat.de>
 * Date: 20.09.14 23:15
 * You must not use this file without permission.
 */
namespace Workflow\Plugins\ConnectionProvider;

class MySQL extends \Workflow\ConnectionProvider {
    protected $_title = 'MySQL Connection';
    private static $Cache = array();

    protected $configFields = array(
        'server' => array(
            'label' => 'MySQL Server',
            'type' => 'text',
            'description' => 'Leave empty to use VtigerCRM Server'
        ),
        'port' => array(
            'label' => 'MySQL Serverport',
            'type' => 'text',
            'description' => 'Leave empty to use VtigerCRM Port',
        ),
        'mysql_username' => array(
            'label' => 'MySQL Login Username',
            'type' => 'text',
            'description' => 'Leave empty to use VtigerCRM Login'
        ),
        'mysql_password' => array(
            'label' => 'MySQL Login Password',
            'type' => 'password',
        ),
        'test_button' => array(
            'label' => 'Test settings',
            'type' => 'test_button',
        ),
    );

    protected $js4Editor = '';

    /**
     * @throws Exception
     */
    public function renderExtraBackend($data) {

    }

    /**
     * @return \PDO
     */
    public function getMySQLConnection() {
        $id = $this->get('_id');
        if(!empty($id) && isset(self::$Cache[$id])) {
            return self::$Cache[$id];
        }

        $server = $this->get('server');
        $port = $this->get('port');
        $mysql_username = $this->get('mysql_username');
        $mysql_password = $this->get('mysql_password');

        global $dbconfig;
        if(empty($server)) {
            $server = $dbconfig['db_server'];
        }
        if(empty($port)) {
            $port = trim($dbconfig['db_port'],':');
        }
        if(empty($mysql_username)) {
            $mysql_username = $dbconfig['db_username'];
            $mysql_password = $dbconfig['db_password'];
        }

        $db = new \PDO('mysql:host='.$server.';port='.$port.';charset=utf8', $mysql_username, $mysql_password);
        $db->setAttribute(\PDO::ATTR_ERRMODE, \PDO::ERRMODE_EXCEPTION);

        if($id == 'vtigerdb') {
            $db->query("use `".$dbconfig['db_name'] . '`;');
        }

        if(!empty($id)) {
            self::$Cache[$id] = $db;
        }

        return $db;
    }
    public function getColumns($tablenames) {
        $condb = $this->getMySQLConnection();

        // get column names
        $query = $condb->prepare("DESCRIBE $tablenames");
        $query->execute();
        $table_names = $query->fetchAll(\PDO::FETCH_ASSOC);
        $columns = array();
        foreach($table_names as $col) {
            $columns[$col['Field']] = $col;
        }
        return $columns;
    }

    public function test() {
        try {
            $connection = $this->getMySQLConnection();
        } catch (\Exception $exp) {
            throw new \Exception ($exp->getMessage());
        }

        return true;
    }

    public function database($newDatabase) {
        $connection = $this->getMySQLConnection();
        $connection->exec('USE `'.$newDatabase.'`;');
    }


}

\Workflow\ConnectionProvider::register('mysql', '\Workflow\Plugins\ConnectionProvider\MySQL');