Natively Connect to Google Cloud Storage Data in PHP

Drop the CData ODBC Driver for Google Cloud Storage into your LAMP or WAMP stack to build Google Cloud Storage-connected Web applications. This article shows how to use PHP's ODBC built-in functions to connect to Google Cloud Storage 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.

Authenticate with a User Account

You can connect without setting any connection properties for your user credentials. After setting InitiateOAuth to GETANDREFRESH, you are ready to connect.

When you connect, the Google Cloud Storage OAuth endpoint opens in your default browser. Log in and grant permissions, then the OAuth process completes

Authenticate with a Service Account

Service accounts have silent authentication, without user authentication in the browser. You can also use a service account to delegate enterprise-wide access scopes.

You need to create an OAuth application in this flow. See the Help documentation for more information. After setting the following connection properties, you are ready to connect:

• InitiateOAuth: Set this to GETANDREFRESH.
• OAuthJWTCertType: Set this to "PFXFILE".
• OAuthJWTCert: Set this to the path to the .p12 file you generated.
• OAuthJWTCertPassword: Set this to the password of the .p12 file.
• OAuthJWTCertSubject: Set this to "*" to pick the first certificate in the certificate store.
• OAuthJWTIssuer: In the service accounts section, click Manage Service Accounts and set this field to the email address displayed in the service account Id field.
• OAuthJWTSubject: Set this to your enterprise Id if your subject type is set to "enterprise" or your app user Id if your subject type is set to "user".
• ProjectId: Set this to the Id of the project you want to connect to.

The OAuth flow for a service account then completes.

Establish a Connection

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

$conn = odbc_connect("CData ODBC GoogleCloudStorage 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.

$conn = odbc_pconnect("CData ODBC GoogleCloudStorage Source","user","password");
...
odbc_close($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 Buckets WHERE Name = ?");

Execute Queries

Execute prepared statements with .

$conn = odbc_connect("CData ODBC GoogleCloudStorage Source","user","password");
$query = odbc_prepare($conn, "SELECT * FROM Buckets WHERE Name = ?");
$success = odbc_execute($query, array('TestBucket'));
 

Execute nonparameterized queries with .

$conn = odbc_connect("CData ODBC GoogleCloudStorage Source","user","password");
$query = odbc_exec($conn, "SELECT Name, OwnerId FROM Buckets WHERE Name = 'TestBucket'");
 

Process Results

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

$conn = odbc_connect("CData ODBC Google Cloud Storage data Source","user","password");
$query = odbc_exec($conn, "SELECT Name, OwnerId FROM Buckets WHERE Name = 'TestBucket'");
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 Cloud Storage data Source","user","password");
$query = odbc_prepare($conn, "SELECT * FROM Buckets WHERE Name = ?");
$success = odbc_execute($query, array('TestBucket'));
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 Cloud Storage-specific adaptations of the PHP community documentation for all ODBC functions.