Fatal error: Class 'Couchbase' not found - couchbase

Question

I'm new to couchbase. When I run the following code :
$cb = new Couchbase("127.0.0.1:8091", "", "", "default");
$cb->set("a", 101);
var_dump($cb->get("a"));
I got this error message:
Fatal error: Class 'Couchbase' not found.
Steps taken:
I installed couchbase-server-enterprise_3.0.3-windows_x86
Successfully installed.
I downloaded C SDK library from
http://docs.couchbase.com/developer/c-2.4/download-install.html for my windows version and PHP Client Library form http://docs.couchbase.com/developer/php-2.0/download-links.html
and copied the files
libcouchbase.dll
php_couchbase.dll
form the unzipped php client library file to my /ext folder.
and copied php_couchbase.dll to /apache/ folder.
created a php script to test
$cb = new Couchbase("127.0.0.1:8091", "", "", "default");
$cb->set("a", 101);
var_dump($cb->get("a"));
When I run this script I get:
Fatal error: Class 'Couchbase' not found in.

Answer 1

It looks like you are using the syntax for the 1.x series of the PHP client but with the 2.x series installed. The syntax for 1.x and 2.x are incompatible with each other so you will have to either uninstall the 2.x client and install the 1.2 client or update your code to match the client you have installed.
An example of some code which re-creates the code in the question with the 2.x syntax would be as follows:
$cluster = new CouchbaseCluster('http://127.0.0.1:8091');
$bucket = $cluster->openBucket('default');
$bucket->insert('a', 101);
var_dump($bucket->get('a'));
You can find further information on using the 2.x PHP Client in the hello Couchbase section of the documentation as well as the 2.x API reference.
Alternatively, if you prefer the 1.x syntax you can uninstall the 2.x client and install the 1.2 client.