Natively Connect to Yelp Data in PHP

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

Start by setting the Profile connection property to the location of the Yelp Profile on disk (e.g. C:\profiles\Yelp.apip). Next, set the ProfileSettings connection property to the connection string for Yelp (see below).

Yelp API Profile Settings

Create an app at yelp.com/developers/v3/manage_app to automatically generate a private API token.

Establish a Connection

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

$conn = odbc_connect("CData ODBC API 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.

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

Execute Queries

Execute prepared statements with odbc_execute.

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

Execute nonparameterized queries with odbc_exec.

$conn = odbc_connect("CData ODBC API Source","user","password");
$query = odbc_exec($conn, "SELECT Id, Name FROM AutocompleteBusinesses WHERE Name = 'Coffee'");
  

Process Results

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

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