public function BiblioEntrezClient::search in Bibliography Module 7

Same name and namespace in other branches

1. 6.2 modules/pubmed/EntrezClient.php \BiblioEntrezClient::search()
2. 6 pubmed/EntrezClient.php \BiblioEntrezClient::search()
3. 7.2 modules/pubmed/EntrezClient.php \BiblioEntrezClient::search()

Returns up to the maximum number of items from the result set starting at $retstart.

If this is the first search for a given term a web environment and a query key is retrieved from the NCBI server in addition to the result set. See https://eutils.ncbi.nlm.nih.gov/corehtml/query/static/esearch_help.html.

Parameters

int $retStart: the sequential number of the first record retrieved - default=0 which will retrieve the first record.

Return value

SimpleXMLElement an array of PubMed IDs

Throws

Exception

See also

setReturnMax

setRelativeDate

File

modules/pubmed/EntrezClient.php, line 308

Provides Entrez client to retrieve items from the NCBI databases.

Class

BiblioEntrezClient

Code

public function search($retStart = 0) {
  if (!is_null($this->webEnvironment)) {
    $params['WebEnv'] = $this->webEnvironment;
    $params['query_key'] = $this->queryKey;
  }
  else {
    $params['usehistory'] = $this->useHistory;
    $params['tool'] = $this
      ->getTool();
    $params['email'] = $this
      ->getEmail();
    $params['term'] = $this
      ->getTerm();
  }
  if (isset($this->dateRange)) {
    $params['mindate'] = $this
      ->getMinDate();
    $params['maxdate'] = $this
      ->getMaxDate();
  }
  $params['retstart'] = $retStart;
  $params['retmax'] = $this
    ->getReturnMax();
  $params['db'] = $this
    ->getDatabase();
  $this->query = self::BASE_URL . 'esearch.fcgi?' . http_build_query($params);
  $result = @simplexml_load_file($this->query);
  if (!$result) {
    throw new Exception('Query ' . $this->query . ' failed.');
  }
  if (isset($result->WebEnv)) {
    $this->webEnvironment = (string) $result->WebEnv;
    $this->queryKey = (int) $result->QueryKey;
    $this->count = (int) $result->Count;
  }
  return $result;
}