Results of the MoreLikeThis component are included with the query resultset, but not directly coupled to the resulting documents. Just like in the Solr response data it is a separate dataset. However the MoreLikeThis resultset has a method to easily access MLT results for a specific document by id (the id depends on your schema).

In the example code below you can see it in use. For each document the MLT result is fetched. This result is an instance of Solarium\QueryType\Select\Result\MoreLikeThis\MoreLikeThis and contains all similar documents for a result. So, as also described in the Solr MLT wiki page, in this case the name MoreLikeThese might be better.




// create a client instance
$client = new Solarium\Client($config);

// get a select query instance
$query = $client->createSelect();

// add a query and morelikethis settings (using fluent interface)

// this executes the query and returns the result
$resultset = $client->select($query);
$mlt = $resultset->getMoreLikeThis();

// display the total number of documents found by solr
echo 'NumFound: '.$resultset->getNumFound();

// show documents using the resultset iterator
foreach ($resultset as $document) {

    echo '<hr/><table>';

    // the documents are also iterable, to get all fields
    foreach ($document as $field => $value) {
        // this converts multivalue fields to a comma-separated string
        if (is_array($value)) {
            $value = implode(', ', $value);

        echo '<tr><th>' . $field . '</th><td>' . $value . '</td></tr>';

    echo '</table><br/><b>MLT results:</b><br/>';

    // mlt results can be fetched by document id (the field defined as uniquekey in this schema)
    $mltResult = $mlt->getResult($document->id);
    if ($mltResult) {
        echo 'Max score: '.$mltResult->getMaximumScore().'<br/>';
        echo 'NumFound: '.$mltResult->getNumFound().'<br/>';
        echo 'Num. fetched: '.count($mltResult).'<br/>';
        foreach ($mltResult as $mltDoc) {
            echo 'MLT result doc: '. $mltDoc->name . ' (id='. $mltDoc->id . ')<br/>';
    } else {
        echo 'No MLT results';