Connect PHP to MSSQL via PDO ODBC

You need to set up several profiles ./etc/odbc.ini,/etc/odbcinst.ini and /etc/freetds/freetds.conf（ These positions are right Ubuntu 12.04 It works , And probably for most *nixes That's right. ）.

You need to install unixodbc and freetds（ Not sure CentOS What is the name of the package on ）. stay Ubuntu in , This will be apt-get install unixodbc tdsodbc.

Help on installing these , Please check this question Can't Install FreeTDS via Yum Package Manager

/etc/odbc.ini（ This file may be empty ）

# Define a connection to a Microsoft SQL server
# The Description can be whatever we want it to be.
# The Driver value must match what we have defined in /etc/odbcinst.ini
# The Database name must be the name of the database this connection will connect to.
# The ServerName is the name we defined in /etc/freetds/freetds.conf
# The TDS_Version should match what we defined in /etc/freetds/freetds.conf
[mssql]
Description             = MSSQL Server
Driver                  = freetds
Database                = XXXXXX
ServerName              = MSSQL
TDS_Version             = 7.1

/etc/odbcinst.ini

# Define where to find the driver for the Free TDS connections.
# Make sure you use the right driver (32-bit or 64-bit).
[freetds]
Description = MS SQL database access with Free TDS
Driver      = /usr/lib/i386-linux-gnu/odbc/libtdsodbc.so
#Driver      = /usr/lib/x86_64-linux-gnu/odbc/libtdsodbc.so
Setup       = /usr/lib/i386-linux-gnu/odbc/libtdsS.so
UsageCount  = 1

/etc/freetds/freetds.conf（ Or you can go to /etc/freetds.conf Find it ）

# The basics for defining a DSN (Data Source Name)
# [data_source_name]
#       host = <hostname or IP address>
#       port = <port number to connect to - probably 1433>
#       tds version = <TDS version to use - probably 8.0>

# Define a connection to the Microsoft SQL Server
[mssql]
    host = XXXXXX
    port = 1433
    tds version = 7.1

You may need tds version = 7.1 According to your MSSQL Version change the line above .

After making these changes , You must restart apache.

In your PHP In the code , You will create... Like this PDO object ：

$pdo = new PDO("dblib:host=mssql;dbname=$dbname", "$dbuser","$dbpwd");

Please note that , Your user name may need to be in the following format ：domain\username.

Besides , If you execute and search in the page “freetds”, You will know that it works ,phpinfo() This will display a mssql part , among freetds List as library version .

The accepted answer is in the actual PHP Is correct in the call . As someone rightly commented , It should call odbc The driver . secondly , It has not been used in odbc.ini The name of the data source configured in (DSN), But it's actually creating a ad-hoc DSN. Instead, ：

$pdo = new PDO("odbc:mssql", "$dbuser","$dbpwd");

among mssql refer to odbc.ini Medium DSN object

You can create ad-hoc DSN：

$pd = new PDO('odbc:DRIVER=FreeTDS;SERVERNAME=mssql;DATABASE=' . $dbName,
              $dbuser, $dbpass);

among mssql Now I mean freetds.conf Server object in , and FreeTDS refer to odbcinst.ini Driver object in

（ This should really be a comment , But I don't represent ）.

If you want to use FreeTDS The driver directly sets pdo odbc Connect To MS SQL The server , Without having to be in the configuration file freetds.conf It is specified in .

$connection_string = "odbc:DRIVER=FreeTDS;SERVER=$serverName;PORT=$portNo;DATABASE=$dbName"; 
$conn = new PDO($connection_string, $dbUser, $dbPass);

If you have a named instance MSSQL The server , You can delete the port number , And then to server_ip\instance_name Format modification $serverName for example ：“192.168.1.1\sqlexpress”, among sqlexpress Is the instance name .

$connection_string = "odbc:DRIVER=FreeTDS;SERVER=$serverName;DATABASE=$dbName"; 
$conn = new PDO($connection_string, $dbUser, $dbPass);

Please note that odbcinst.ini Configure driver location in

[FreeTDS]
Description = TDS driver (Sybase/MS SQL)
Driver      = libtdsodbc.so
Setup       = libtdsS.so