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DSN de PDO_SQLSRVConectar a bases de datos de MS SQL Server y de SQL Azure


El Nombre del Origen de Datos (DSN) de PDO_SQLSRV está compuesto de los siguientes elementos:

DSN prefix

El prefijo DSN es sqlsrv:.


El nombre de la aplicación usada en el rastreo.


Especifica si la conexión se asigna desde una agrupación de conexiones (1 o TRUE) o no (0 o FALSE).


El nombre de la base de datos.


Especifica si la comunicación con SQL Server está encriptada (1 o TRUE) o desencriptada (0 o FALSE).


Especifica si el servidor y la instancia de la copia de la base de datos (si está habilitada y configurada) a utilizar cuando el servidor primario no esté disponible.


Especifica el número de segundos a esperar antes de dar como fallido el intento de conexión.


Deshabilita o explítamente habilita el soporte para múltiples conjutos de resultados activos (MARS por sus siglas en íngles).


Especifica si utilizar las normas de SQL-92 para identificadores entrecomillados (1 o TRUE) o utilizar las normas antiguas de Transact-SQL (0 o false).


El nombre del servidor de bases de datos.


Especifica la ruta del fichero utilizado para datos de rastreo.


Especifica si el rastreo de ODBC está habilitado (1 o TRUE) o deshabilitado (0 o FALSE) para la conexión que se va a establecer.


Especifica el nivel de aislamiento de las transacciones. Los valores aceptados para esta opción son PDO::SQLSRV_TXN_READ_UNCOMMITTED, PDO::SQLSRV_TXN_READ_COMMITTED, PDO::SQLSRV_TXN_REPEATABLE_READ, PDO::SQLSRV_TXN_SNAPSHOT, y PDO::SQLSRV_TXN_SERIALIZABLE.


Especifica si el cliente debería confiar en (1 o TRUE) o rechazar (0 o FALSE) un certificado de servidor autofirmado.


Especifica el nombre de la computadora para rastreos.


Ejemplo #1 Ejemplos de DSN de PDO_SQLSRV

El siguiente ejemeplo muestra cómo conectar a una base de datos de MS SQL Server especificada:

$c = new PDO("sqlsrv:Server=localhost;Database=testdb", "NombreUsuario", "Contraseña");

El siguiente ejemplo muestra cómo conectar a una base de datos de MS SQL Server en un puerto especificado:

$c = new PDO("sqlsrv:Server=localhost,1521;Database=testdb", "NombreUsuario", "Contraseña");

El siguiente ejemplo muestra cómo conectar a un base de datos de SQL Azure con el ID de servidor 12345abcde. Obsérvese que cuando se realiza una conexión a SQL Azure con PDO, el nombre del usuario será NombreUsuario@12345abcde (NombreUsuario@IdServidor).

$c = new PDO("sqlsrv:Server=12345abcde.database.windows.net;Database=testdb", "NombreUsuario@12345abcde", "Password");

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User Contributed Notes 5 notes

php at zootal dot com
4 months ago
I finally discovered that sqlsrv and pdo_sqlsrv are not the same thing, and work differently, and have different requirements. As near as I can tell, sqlsrv requires the odbc driver from Microsoft. pdo_sqlsrv does not, it uses pdo. This caused me a lot of grief until I figured this out, as most of the discussion for pdo_sqlsrv seems to relate to sqlsrv, not pdo_sqlsrv. They are not the same.

pecl install sqlsrv

This will download and build the module for sqlsrv-4.3.0.tgz. This will not work without the microsoft ODBC driver, which apparently needs to be downloaded and installed separately. I was never able to get this to work as my distro is not one of the supported distros the Micorosoft builds the ODBC driver for.

pecl install pdo_sqlsrv

This downloads and installs the module for pdo_sqlsrv-4.3.0.tgz. This does NOT require the Microsoft ODBC driver. Why? Because it does not use ODBC, it uses PDO to connect to mssql server.

To make a connection using pdo_sqlsrv (without the Microsoft ODBC driver):

$dbh = new PDO ("dblib:host=<ip address>;dbname=db","user_id","password");

Note that we are using "dblib:host", NOT "sqlsrv:host".

So to clarify: In my case, I'm using PHP 7.2 and I want to connect to a Microsoft sql server database. I'm using Slackware 14.2 64 bit, and Microsoft does not build an ODBC driver that works (at least I could not get it to work) for this distro.

1) Install unixODBC. I had to download the source and ./configure|make|make install, as the version that came with the package manager did not work. Don't be afraid to go outside of your package manager and install unixODBC from scratch.
2) When you configure PHP, be sure to include --with-pdo-odbc=unixODBC
3) After you install PHP, use PECL to download and install pdo_sqlsrv. Do NOT install sqlsrv. And be sure to add extension-pdo_sqlsrv to php.ini if necessary, the PECL installer doesn't always do this.

Now you should be able to to do this:

$dbh = new PDO ("dblib:host=<ip address>;dbname=db","user_id","password");

When I do the steps above, it works great. YMMV. I welcome comments from anyone that knows more about this process.
Daniel Klein
9 months ago
This is the code that worked for me. I had to specify both the host name [localhost] and the server instance name [SQLEXPRESS], separating them with a double backslash before it would work.

= new PDO('sqlsrv:Server=localhost\\SQLEXPRESS;Database=MyDatabase', 'MyUsername', 'MyPassword');
support at spam eaccounts trap net
4 years ago
I suspect the problem with "Server=foo-sql\MSSQLSERVER" was you didn't escape the backslash, with a backslash.

If hostname worked, than IP would work as well given a hostname resolves to an IP unless your DNS was mapping to the wrong IP which would be a simple issue.

I suspect you are running your web services on the same host as mssql?  If so, confirm that your mssql server is set to bind to IP addresses (if you want access from the outside of that box).  If you are only able to connect via a name (as in a NetBIOS or Active Directory name), it's likely you are connecting to a "socket" or named pipe.
david at nospam-rm-this dot functionalchaos dot net
4 years ago
I found with MS-SQL Server 2008 on Windows Server 2008 R2 that I needed to use the MSSQL Server name. The servers hostname or IP address would not work ( with or without port, and/or SQL instance name, etc.) After trying several combinations, this is what I found worked in my configuration:

host-name: mssqlhost.mydomain.org
mssql-server-name: foo-sql
mssql-instance-name: MSSQLSERVER
database-name: mydb


= new PDO("sqlsrv:Server=foo-sql,1433;Database=mydb", $user , $pass);


The above worked with and without port (,1433). I also noticed adding the instance name (MSSQLSERVER) after the server name with a slash (\), as in "Server=foo-sql\MSSQLSERVER" caused a failure to connect.
alasdair at angryloner dot com dot au
3 years ago
Adding the backslash solved the problem for me.

Here's my functioning localdb connection string:

new PDO("sqlsrv:Server=(localdb)\\v11.0 ; Database = my_db ; AttachDBFilename = C:\Users\user\my_db.mdf", "", "");
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