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$solr_baseurl_dspace = "http://localhost:8080/solr/search/query?";
$solr_query = "test";
$solr_URL_dspace = $solr_baseurl_dspace."wt=phps&q=".urlencode($solr_query." AND withdrawn:false"); // use withdrawn:false with DSpace newer than 1.8
$response_dspace = file_get_contents($solr_URL_dspace, false, stream_context_create(array('http' => array('timeout' => 10))));
$result_dspace = unserialize($response_dspace);
$num_dspace = $result_dspace['response']['numFound'];
echo $num_dspace;