'your access token', 'refresh_token' => 'your refresh token'); $wrap = new CS_REST_Lists('List ID', $auth); /* * The DataType parameter must be one of * CS_REST_CUSTOM_FIELD_TYPE_TEXT * CS_REST_CUSTOM_FIELD_TYPE_NUMBER * CS_REST_CUSTOM_FIELD_TYPE_MULTI_SELECTONE * CS_REST_CUSTOM_FIELD_TYPE_MULTI_SELECTMANY * CS_REST_CUSTOM_FIELD_TYPE_DATE * CS_REST_CUSTOM_FIELD_TYPE_COUNTRY * CS_REST_CUSTOM_FIELD_TYPE_USSTATE * */ $result = $wrap->create_custom_field(array( 'FieldName' => 'Custom field name', 'DataType' => CS_REST_CUSTOM_FIELD_TYPE_MULTI_SELECTONE, 'Options' => array('First option', 'Second Option') )); echo "Result of POST /api/v3.1/lists/{ID}/customfields\n
"; if($result->was_successful()) { echo "Created with ID\n
".$result->response; } else { echo 'Failed with code '.$result->http_status_code."\n
";
    var_dump($result->response);
    echo '
'; }