Connect to MS SQL 2014 via PHP with MD5 password

Question

I'm connecting to MS SQL Server 2014 via PHP and sql_srv:

<?php
$serverName = "SQLEXPRESS";
$connectionInfo = array( "Database"=>"TDB", "UID"=>"TEST", "PWD"=>"1234");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
?>

As you can see, password stored just in a plain text. So if somebody will access to php file with this connection info they will gain root-access to my DB. How I can encrypt it?

I've tried something like this:

$connectionInfo = array( "Database"=>"TDB", "UID"=>"TEST", "PWD"=>MD5("1234"));

or

$connectionInfo = array( "Database"=>"TDB", "UID"=>"TEST", "PWD"=>MD5('1234'));

or

$connectionInfo = array( "Database"=>"TDB", "UID"=>"TEST", "PWD"=>MD5(1234));

or

$connectionInfo = array( "Database"=>"TDB", "UID"=>"TEST", "PWD"=>"MD5(1234))";

etc but always got auth-error... maybe because

• I used incorrect syntax
• MS SQL storing passwords not in MD5 by default

How I can encrypt password in "PWD" filed to keep it safely in connection-info file? Thanks!

---

UPDATED:

I've realized that even if I wrote something like "PWD"=>MD5("1234") I will SEND it in MD5, but still keep it as plain text in my configuration file, ROFL!

So I think that I need something like this:

$connectionInfo = array( "Database"=>"TDB", "UID"=>"TEST", "PWD"=>"81dc9bdb52d04dc20036dbd8313ed055");

where 81dc9bdb52d04dc20036dbd8313ed055 - MD5 hash of '1234' password