PHP DB_CONNECT::query_postgres示例

<?php

/** 
* @author sergiwf <*****@*****.**>
* @copyright 2016 sergiwf
*/
require_once 'config.php';
require_once 'connect.php';
require_once 'createCsv.php';
$db = new DB_CONNECT();
$csv = new CREATE_CSV();
if (DB_DATABASE == 'postgres') {
    $db->connect_postgres();
    $data_query = $db->query_postgres(QUERY);
    $csv->create_header_postgres($data_query);
    $csv->create_body_postgres($data_query, $db);
    $db->close_postgres();
} else {
    if (DB_DATABASE == 'mysql') {
        $db->connect_mysql();
        $data_query = $db->query_mysql(QUERY);
        $csv->create_header_mysql($data_query);
        $csv->create_body_mysql($data_query, $db);
        $db->close_mysql();
    }
}