SolrCollapseFunction::__construct

Constructor

&reftitle.description; public `SolrCollapseFunction::__construct` `string` `field`

Collapse Function constructor

&reftitle.parameters;

`field`

- The field name to collapse on.

  In order to collapse a result. The field type must be a single valued String, Int or Float.

&reftitle.examples;

### `SolrCollapseFunction::__construct` example

    <?php

    include "bootstrap.php";

    $options = array
    (
        'hostname' => SOLR_SERVER_HOSTNAME,
        'login'    => SOLR_SERVER_USERNAME,
        'password' => SOLR_SERVER_PASSWORD,
        'port'     => SOLR_SERVER_PORT,
        'path'     => SOLR_SERVER_PATH
    );

    $client = new SolrClient($options);

    $query = new SolrQuery('*:*');

    $func = new SolrCollapseFunction('field_name');

    $func->setMax('sum(cscore(),field(some_other_field))');
    $func->setSize(100);
    $func->setNullPolicy(SolrCollapseFunction::NULLPOLICY_EXPAND);

    $query->collapse($func);

    $queryResponse = $client->query($query);

    $response = $queryResponse->getResponse();

    print_r($response);

    ?>

&reftitle.seealso;

- `SolrQuery::collapse`