<?php
class Conn {

    private static $Host = SIS_DB_HOST;
    private static $User = SIS_DB_USER;
    private static $Pass = SIS_DB_PASS;
    private static $Dbsa = SIS_DB_DBSA;

    private static $Connect = null;

    private static function Conectar() {
        try {
            if (self::$Connect == null):
                $dsn = 'mysql:host=' . self::$Host . ';dbname=' . self::$Dbsa;
                $options = [ PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES UTF8'];
                self::$Connect = new PDO($dsn, self::$User, self::$Pass, $options);
                self::$Connect->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
            endif;
        } catch (PDOException $e) {
            PHPErro($e->getCode(), $e->getMessage(), $e->getFile(), $e->getLine());
            die;
        }

        return self::$Connect;
    }

    public static function getConn() {
        return self::Conectar();
    }

    private function __construct() {
        
    }

    private function __clone() {
        
    }

    private function __wakeup() {
        
    }

}

if ($_SERVER['HTTP_HOST'] == $urlcentral):
    define('HOST', $linkBanco);
    define('USER', $userBanco);
    define('PASS', $senhaBanco);
    define('DBSA', $nomeBanco);
else:
    define('HOST_CLIENTE', $linkBancoCliente);
    define('USER_CLIENTE', $userBancoCliente);
    define('PASS_CLIENTE', $senhaBancoCliente);
    define('DBSA_CLIENTE', $nomeBancoCliente);
endif;