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Natively Connect to Open Exchange Rates Data in PHP

The CData ODBC driver for Open Exchange Rates enables you to create PHP applications with connectivity to Open Exchange Rates data. Leverage the native support for ODBC in PHP.

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

The Open Exchange Rates API supports basic authentication with an App Id. After you register, your App Id is displayed in your account dashboard. Set this to the AppId connection property.

Establish a Connection

Open the connection to Open Exchange Rates by calling the odbc_connect or odbc_pconnect methods. To close connections, use odbc_close or odbc_close_all.

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

Connections opened with odbc_connect are closed when the script ends. Connections opened with the odbc_pconnect 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.

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

Create Prepared Statements

Create prepared statements and parameterized queries with the odbc_prepare function.

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

Execute Queries

Execute prepared statements with odbc_execute.

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

Execute nonparameterized queries with odbc_exec.

$conn = odbc_connect("CData ODBC OpenExchangeRates Source","user","password"); $query = odbc_exec($conn, "SELECT Id, Statistics_ViewCount FROM Projects");

Process Results

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

$conn = odbc_connect("CData ODBC Open Exchange Rates data Source","user","password"); $query = odbc_exec($conn, "SELECT Id, Statistics_ViewCount FROM Projects"); while($row = odbc_fetch_array($query)){ echo $row["Id"] . "\n"; }

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

$conn = odbc_connect("CData ODBC Open Exchange Rates data Source","user","password"); $query = odbc_prepare($conn, "SELECT * FROM Projects WHERE Id = ?"); $success = odbc_execute($query, array('MyProjectId')); 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 Open Exchange Rates-specific adaptations of the PHP community documentation for all ODBC functions.