Unable to connect to SQL Server with PHP

Question

Connection to sqlsrv string not working.

$login = new PDO(\"sqlsrv:server=MYSQLSERVER\\SQLEXPRESS;Database=db_name\", \"user\", \"passw\");


        

Answer 1

Looks like to connect to MS-SQL, you will need to utilize ODBC.

Reference:http://php.net/manual/en/pdo.construct.php#120705

$odbc="odbc:Driver={SQL Server};Server=$server;Database=$database;";

$cnx = new PDO( $odbc , $user, $password);

Answer 2

There's a problem with PHP Sql Server driver
You should update it to new version

As you mentioned you are using windows, this version is fully working on windows

https://github.com/Microsoft/msphpsql/releases/tag/v4.1.1-Windows

Answer 3

Try "ConnectionPooling=0" in DSN.

sometimes working and sometimes return error

It might be a problem on re-using connection.

DSN Reference: https://msdn.microsoft.com/en-us/library/ff628167(v=sql.105).aspx