$solr = new Basicsolr('core_name');
$response = $solr->query(*:*);
print_r($response);

$solr = new Basicsolr('core_name');
$response = $solr->getColumns('document_name');
print_r($response);

$solr = new Basicsolr('core_name');
$response = $solr->AddnNewUserToSolrCore($resultset) 
//give resultset as an argument. make sure in this method of library you have defined your document as key value pair.

$solr = new Basicsolr('core_name');
$response = $solr->updateRecord($solr_id,$doc_name,$value);
print_r($response);

$solr = new Basicsolr('core_name');
$response = $solr->deleteRecord($solr_id);
print_r($respnse);

$solr = new Basicsolr('core_name');
$response = $solr->IncrimentValue($solr_id,$doc_name,$value)
print_r($response);