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    SolrDisMaxQuery::setBoostFunction

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    SolrDisMaxQuery::setBoostFunction — Sets a Boost Function (bf parameter)

    说明

    public SolrDisMaxQuery::setBoostFunction(string $function): SolrDisMaxQuery

    Sets Boost Function (bf parameter).

    Functions (with optional boosts) that will be included in the user's query to influence the score. Any function supported natively by Solr can be used, along with a boost value. e.g.:

    recip(rord(myfield),1,2,3)^1.5

    参数

    function

    返回值

    SolrDisMaxQuery

    示例

    示例 #1 SolrDisMaxQuery::setBoostFunction() example

    <?php

    $dismaxQuery     = new SolrDisMaxQuery('lucene');

    $boostRecentDocsFunction = "recip(ms(NOW,mydatefield),3.16e-11,1,1)";
    $dismaxQuery->setBoostFunction($boostRecentDocsFunction);

    echo     $dismaxQuery.PHP_EOL;

    ?>

    以上示例的输出类似于：

    q=lucene&defType=edismax&bf=recip(ms(NOW,mydatefield),3.16e-11,1,1)
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