Php cannot connect to SQL Server 2008 (using pdo dblib)

I have SQL Server 2008 R2 (running on Windows Server 2008 64bit) which I am trying to connect from PHP

My server PHP config:

CentOS 6.6

PHP 5.5.24 (compiled --with-mssql = / usr / local / freetds --with-pdo-dblib = / usr / local / freetds)

Apache 2.4.12

SELinux disabled (as per this solution: PDO DBLIB, access to SQL Server 2008 and 2012 )

I wrote the following PHP code to connect to a SQL server:

try {
    require "classes/mypdo.class.php";
    $pdo = new MyPDO('dblib:dbname=myDB;host=myServer', 'myUser', 'myPassword');
    $pdo->debug = true;
} catch (PDOException $e) {
    die("Connection failed: {$e->getMessage()}");
}

      

        
        
        
      

    

Connection failed with error:

Connection failed: SQLSTATE[HY000] Unknown host machine name (severity 2)

      

        
        
        
      

    

I've tried other DSN syntaxes like:

$pdo = new MyPDO('dblib:host=192.168.0.10', 'myUser', 'myPassword');
$pdo = new MyPDO('dblib:host=192.168.0.10:1433', 'myUser', 'myPassword');
$pdo = new MyPDO('dblib:host=myServer', 'myUser', 'myPassword');

      

        
        
        
      

    

and many more options ... When I use IP instead of DSN, the error is:

Connection failed: SQLSTATE[HY000] Unable to connect: Adaptive Server is unavailable or does not exist (severity 9)

      

        
        
        
      

    

/etc/freetds.conf

[global]
tds version = 7.1
dump file = /tmp/freetds.log
timeout = 10
connect timeout = 10
text size = 64512
client charset = UTF-8

[myServer]
host = 192.168.0.10
port = 1433
tds version = 7.1

      

        
        
        
      

    

I suspect PHP is ignoring freetds.conf (cannot validate it).

When I use tsql the connection works.

tsql -S myServer -U MyUser -P MyPassword
locale is "en_US.UTF-8"
locale charset is "UTF-8"
using default charset "UTF-8"
1> 

      

        
        
        
      

    

What is the reason for PHP refusing to connect to SQL Server?