//FETCH FROM ARXIV
if (isset($_POST['fetch-arxiv']) && !empty($arxiv_id) && empty($doi) && isset($_POST['fetch-arxiv'])) {
$response = array();
fetch_from_arxiv($arxiv_id);
$_POST = array_merge($_POST, $response);
}
//FETCH FROM PUBMED
if (isset($_POST['fetch-pubmed']) && (!empty($pmid) || !empty($doi)) && isset($_POST['fetch-pubmed'])) {
$response = array();
fetch_from_pubmed($doi, $pmid);
$_POST = array_merge($_POST, $response);
}
// FETCH FROM NASA ADS
if (isset($_POST['fetch-nasaads']) && (!empty($doi) || !empty($nasa_id)) && empty($pmid) && isset($_POST['fetch-nasaads'])) {
$response = array();
fetch_from_nasaads($doi, $nasa_id);
$_POST = array_merge($_POST, $response);
}
// FETCH FROM CROSSREF
if (!empty($doi) && empty($pmid)) {
$response = array();
fetch_from_crossref($doi);
$_POST = array_merge($_POST, $response);
}
########## check for duplicate titles in table library ##########
database_connect($database_path, 'library');
if (!empty($_POST['doi'])) {
$doi_query = $dbHandle->quote($_POST['doi']);
$result = $dbHandle->query("SELECT id,title FROM library WHERE doi={$doi_query} LIMIT 1");
} else {
$title_query = $dbHandle->quote(substr($_POST['title'], 0, -2) . "%");
}
if (isset($_GET['database_crossref']) && $_GET['database_crossref'] == '1' && empty($title)) {
fetch_from_crossref($doi);
extract($response);
}
//TRY AGAIN WITH DOI ONE CHARACTER SHORTER
if (empty($title)) {
$doi = substr($doi, 0, -1);
if (isset($_GET['database_pubmed']) && $_GET['database_pubmed'] == '1') {
fetch_from_pubmed($doi, '');
extract($response);
$uid = join("|", (array) $uid);
$url = join("|", (array) $url);
}
if (isset($_GET['database_nasaads']) && $_GET['database_nasaads'] == '1' && empty($title)) {
fetch_from_nasaads($doi, '');
extract($response);
$uid = join("|", (array) $uid);
$url = join("|", (array) $url);
}
if (isset($_GET['database_crossref']) && $_GET['database_crossref'] == '1' && empty($title)) {
fetch_from_crossref($doi);
extract($response);
}
}
if (empty($title)) {
if (isset($_GET['failed']) && $_GET['failed'] == '1') {
$string = preg_replace($patterns, ' ', $string);
$string = preg_replace('/(^|\\s)\\S{1,2}(\\s|$)/', ' ', $string);
$string = preg_replace('/\\s{2,}/', " ", $string);
$fulltext_array = array();