(PECL solr >= 0.9.2)
SolrQuery::setEchoHandler — Toggles the echoHandler parameter
public SolrQuery::setEchoHandler ( bool $flag ) : SolrQuery
If set to true, Solr places the name of the handle used in the response to the client for debugging purposes.
flag
true or false
Returns the current SolrQuery object, if the return value is used.
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https://www.php.net/manual/en/solrquery.setechohandler.php