How to connect to MS SQL Server 2000 in PHP7 PDO on CentOS 7

#php

As a premise, php and pdo are installed.

At first, install nixODBC-devel and freetds and php-odbc.

$ sudo yum -y install unixODBC-devel
$ sudo yum -y install freetds
$ sudo yum -y install php-odbc

And then, edit /etc/odbcinst.ini

$ sudo vi /etc/odbcinst.ini

[/etc/odbcinst.ini]:

[FreeTDS]
Description = ODBC for FreeTDS
Driver64    = /usr/lib64/libtdsodbc.so
Setup64     = /usr/lib64/libtdsodbc.so
FileUsage   = 1

Finally, create an PDO object as follows.

<?php
    $host = 'xxx.xxx.xxx.xxx';
    $port = '1433';
    $dbname = 'database-name';
    $username = 'username';
    $password = 'password';

    $dsn = "odbc:Driver=FreeTDS;" . 
        "SERVER={$host};PORT={$port};DATABASE={$dbname};" . 
        "ClientCharset=UTF-8";
    $pdo = new \PDO($dsn, $username, $password);