Natively Connect to Google Spanner Data in PHP

Drop the CData ODBC Driver for Google Spanner into your LAMP or WAMP stack to build Google Spanner-connected Web applications. This article shows how to use PHP's ODBC built-in functions to connect to Google Spanner data, execute queries, and output the results.

Configure a DSN

If you have not already, first specify connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Google Spanner uses the OAuth authentication standard. To authenticate using OAuth, you can use the embedded credentials or register an app with Google.

See the Getting Started guide in the CData driver documentation for more information.

Establish a Connection

Open the connection to Google Spanner by calling the or methods. To close connections, use or .

$conn = odbc_connect("CData ODBC GoogleSpanner Source","user","password");

Connections opened with are closed when the script ends. Connections opened with the method are still open after the script ends. This enables other scripts to share that connection when they connect with the same credentials. By sharing connections among your scripts, you can save system resources, and queries execute faster.

$conn = odbc_pconnect("CData ODBC GoogleSpanner Source","user","password");
...
odbc_close($conn); //persistent connection must be closed explicitly

Create Prepared Statements

Create prepared statements and parameterized queries with the function.

$query = odbc_prepare($conn, "SELECT * FROM Customer WHERE Id = ?");

Execute Queries

Execute prepared statements with .

$conn = odbc_connect("CData ODBC GoogleSpanner Source","user","password");
$query = odbc_prepare($conn, "SELECT * FROM Customer WHERE Id = ?");
$success = odbc_execute($query, array('1'));
 

Execute nonparameterized queries with .

$conn = odbc_connect("CData ODBC GoogleSpanner Source","user","password");
$query = odbc_exec($conn, "SELECT Name, TotalDue FROM Customer");
 

Process Results

Access a row in the result set as an array with the function.

$conn = odbc_connect("CData ODBC Google Spanner data Source","user","password");
$query = odbc_exec($conn, "SELECT Name, TotalDue FROM Customer");
while($row = odbc_fetch_array($query)){
 echo $row["Name"] . "\n";
}

Display the result set in an HTML table with the function.

$conn = odbc_connect("CData ODBC Google Spanner data Source","user","password");
$query = odbc_prepare($conn, "SELECT * FROM Customer WHERE Id = ?");
$success = odbc_execute($query, array('1'));
if($success)
 odbc_result_all($query);

More Example Queries

You will find complete information on the driver's supported SQL in the help documentation. The code examples above are Google Spanner-specific adaptations of the PHP community documentation for all ODBC functions.