php抓取NCIB中pubmed文献数据(6)

print "$count items found\n";

$translated = (string) $xml->QueryTranslation;

printf("Translated query: %s\n\n", $translated);

$params = array(

'db' => 'pubmed',

'retmode' => 'xml',

'query_key' => (string) $xml->QueryKey,

'WebEnv' => (string) $xml->WebEnv,

'retmax' => $count,

);

$url = 'http://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?' . http_build_query($params); print "URL: $url\n";

$file = sprintf('%s.xml', preg_replace('/\W/', '_', $translated));

$file = $pubmedyear."-".$pubmedmonth."-".$pubmedday."_$file";

$wgetfilelog="wget.{$file}.log";

system(sprintf("wget %s -O %s 1>& $wgetfilelog", escapeshellarg($url),

escapeshellarg($file)),$ret);

$flag=wget_errors($wgetfilelog);

$flag_xml=xml_is_read($file);

if($ret==0 && $flag==1 && $flag_xml==1){

return $count;

}

else{

return 0;

}

}