The morelikethis component can be used if you want to retrieve similar documents for your query results. This component uses morelikethis in the standardrequesthandler, not the standalone morelikethis handler. For more info see


Name Type Default value Description
fields string null The fields to use for similarity. NOTE: if possible, these should have a stored TermVector. Separate multiple fields with commas.
minimumtermfrequency int null Minimum Term Frequency - the frequency below which terms will be ignored in the source doc.
mimimumdocumentfrequency int null Minimum Document Frequency - the frequency at which words will be ignored which do not occur in at least this many docs.
minimumwordlength int null Minimum word length below which words will be ignored.
maximumwordlength int null Maximum word length above which words will be ignored.
maximumqueryterms int null Maximum number of query terms that will be included in any generated query.
maximumnumberoftokens int null Maximum number of tokens to parse in each example doc field that is not stored with TermVector support.
boost boolean null If true the query will be boosted by the interesting term relevance.
queryfields string null Query fields and their boosts using the same format as that used in DisMaxQParserPlugin. These fields must also be specified in fields.Separate multiple fields with commas.
count int null The number of similar documents to return for each result




// 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';