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@MartinThoma MartinThoma/arxiv.php
Last active Jan 1, 2016

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Get BibTeX from Arxiv identifiert.
<?
error_reporting(E_ALL);
/* use the arXiv API: http://arxiv.org/help/api/index */
function startsWith($haystack, $needle) {
return $needle === "" || strpos($haystack, $needle) === 0;
}
function getLastname($name) {
$tmp = explode(' ', $name);
return end($tmp);
}
function file_get_contents_curl($url) {
// http://stackoverflow.com/a/6595112/562769
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //Set curl to return the data instead of printing it to the browser.
curl_setopt($ch, CURLOPT_URL, $url);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
function printEntry($entry){
$author = $entry->author->name;
$title = trim(preg_replace('/\s\s+/', ' ', $entry->title));
$datePublished = strtotime($entry->published);
/* Try to find version. Assume version one in case of no hit. */
$version = 1;
preg_match("/[0-9]{4}\.[0-9]{4}v[0-9]+/", $entry->id, $matches);
if (count($matches)==1) {
$version = substr($entry->id, strlen("http://arxiv.org/abs/1207.0016v"));
}
/* Print everything*/
?>
<pre>
@Online{<?echo strtolower(getLastname($author));?>,
author = {<?
$i=0;
foreach($entry->{'author'} as $author ) {
if ($i != 0) {
echo " AND ";
}
echo $author->name;
$i++;
}
?>},
title = {<?echo $title;?>},
version = {<?echo $version;?>},
date = {<?echo date('Y-m-d', $datePublished);?>},
eprinttype = {arxiv},
eprintclass = {<?
$i=0;
foreach($entry->{'category'} as $cat ) {
if ($i != 0) {
echo ", ";
}
echo($cat["term"]);
$i++;
}
?>},
eprint = {<?echo $entry->id;?>}
}
</pre>
Link: <a href="<?echo $entry->id;?>"><?echo $entry->title;?></a>
<?
}
/********************************************************************
* Main *
*******************************************************************/
if(isset($_GET['id'])) {
$id = $_GET['id'];
preg_match("/[0-9]{4}\.[0-9]{4}/", $id, $matches);
if (count($matches)==1) {
$id = $matches[0];
}
/* Get archive XML information about paper */
$html = file_get_contents_curl("http://export.arxiv.org/api/query?search_query=".$id."&start=0&max_results=1");
$xml = new SimpleXMLElement($html);
$entries = $xml->entry;
if ($entries != "") {
foreach ($entries as $entry) {
printEntry($entry);
}
} else {
echo "arXiv did not find '".$id."'. ";
}
} else {
$id = "http://arxiv.org/abs/1112.4344";
}
?>
<hr/>
Please enter <a href="http://arxiv.org/">arXiv</a> id or full URL:
<form method="GET">
<input type="text" name="id" id="id" value="<?echo $id;?>" style="width:80%"/>
<input type="submit" />
</form>
<h2>More BibTex-Information</h2>
<ul>
<li><a href="http://texblog.org/2007/08/09/how-to-use-a-bibtex-file/">How to use Bibtex as a reference library for Latex</a></li>
<li><a href="http://www.bibtex.org/Using/de/">Wie benutzt man BibTeX mit LaTeX</a></li>
<li><a href="http://manas.tungare.name/software/isbn-to-bibtex/">ISBN to BibTeX</a></li>
</ul>
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