You can perform Couchbase Query Language (N1QL) queries via the PHP SDK.

To send N1QL queries, you must specify a list of application query hosts through the enableN1ql()method (a temporary necessity). After you have done this, you can perform a N1QL query by using the query() method, which accepts a query created through the CouchbaseN1qlQuery class. You receive an array of objects representing the results.

The following example shows how to send a N1QL query:

$myBucket = $myCluster->openBucket();
$query = CouchbaseN1qlQuery::fromString('SELECT * FROM default');
$res = $myBucket->query($query);
var_dump($res);

Sample output from the example:

array(2) {
  [0]=>
  array(1) {
    ["field_name"]=>
    string("value1")
  }
  [1]=>
  array(1) {
    ["field_name"]=>
    string("value2")
  }
}