PHP yaz_search函数代码示例

 static function search($query, $start = 1, $num = 10)
 {
     yaz_search(self::$connection, 'rpn', $query);
     yaz_range(self::$connection, $start, $num);
     yaz_wait();
     self::is_error();
 }

    <input type="checkbox" checked="checked"
    		name="host[]" value="z3950.loc.gov:7090/voyager" />
        Library of Congress
    <br />
    RPN Query:
    <input type="text" size="30" name="query" placeholder="ex: @attr 1=4 \\"mysql%\\" " />
    <input type="submit" name="action" value="Search" />
    </form>
    ';
} else {
    echo 'You searched for ' . htmlspecialchars($query) . '<br />';
    for ($i = 0; $i < $num_hosts; $i++) {
        $id[] = yaz_connect($host[$i]);
        yaz_syntax($id[$i], "usmarc");
        yaz_range($id[$i], 1, 10);
        yaz_search($id[$i], "rpn", $query);
    }
    yaz_wait();
    for ($i = 0; $i < $num_hosts; $i++) {
        echo '<hr />' . $host[$i] . ':';
        $error = yaz_error($id[$i]);
        if (!empty($error)) {
            echo "Error: {$error}";
        } else {
            $hits = yaz_hits($id[$i]);
            echo "Result Count {$hits}";
        }
        echo '<dl>';
        for ($p = 1; $p <= 10; $p++) {
            $rec = yaz_record($id[$i], $p, "string");
            if (empty($rec)) {

 function fetchYazInfos($book)
 {
     global $booklibrary_configuration;
     if (!extension_loaded('yaz')) {
         echo "<script> alert('Sorry, \\'yaz.so\\' isn\\'t loaded....'); window.history.go(-1);</script>\n";
         exit;
     }
     $param_ws = mosBooklibraryWS::getWsParamById($book->informationFrom) - 1;
     $hosts = mosBooklibraryWS::getWSArray();
     $str_conect = trim($hosts[$param_ws][3]) . ":" . trim($hosts[$param_ws][4]) . "/" . trim($hosts[$param_ws][5]);
     //$str_conect ="z3950.bibsys.no:2100";// "140.147.249.38:7090/voyager";
     //$str_conect = "troy.lib.sfu.ca:210/innopac";
     //echo $str_conect;
     $id = yaz_connect($str_conect);
     yaz_syntax($id, $hosts[$param_ws][6]);
     $query = '@attr 1=7  ' . $book->isbn;
     yaz_search($id, 'rpn', $query);
     yaz_wait();
     $error = yaz_error($id);
     if (!empty($error)) {
         echo "<script> alert('ERROR:" . addslashes($error) . "'); window.history.go(-1);</script>\n";
         exit;
     }
     $rec = yaz_record($id, 1, "array");
     $error = yaz_error($id);
     if (yaz_hits($id) == 0) {
         echo "<script> alert('On this ISBN(" . addslashes($book->isbn) . ") of the not found records'); window.history.go(-1);</script>\n";
         yaz_close($id);
         exit;
     } elseif (!empty($error)) {
         echo "<script> alert('ERROR:" . addslashes($error) . "'); window.history.go(-1);</script>\n";
         yaz_close($id);
         exit;
     }
     yaz_close($id);
     $book->comment = "";
     $book->title = "";
     $book->authors = "";
     $book->manufacturer = "";
     $book->release_Date = "";
     $book->URL = "";
     foreach ($rec as $i => $value) {
         $s = explode(")(", $rec[$i][0]);
         if (isset($s[2])) {
             switch (substr($s[0], 3, strlen($s[0]))) {
                 case '245':
                     $book->comment .= $rec[$i][1];
                     if (substr($s[2], 2, strlen($s[2]) - 3) == 'a') {
                         $book->title .= $rec[$i][1];
                     }
                     break;
                 case '100':
                     $book->authors .= $rec[$i][1];
                     break;
                 case '260':
                     $book->manufacturer .= $rec[$i][1];
                     if (substr($s[2], 2, strlen($s[2]) - 3) == 'c') {
                         $book->release_Date .= $rec[$i][1];
                     }
                     break;
                 case '856':
                     $book->URL .= $rec[$i][1];
                     break;
             }
         }
     }
     return $book;
 }

function yazCclArray($ccl)
{
    global $config;
    $system = $config['lib']['system'];
    // Create an array to hold settings for the different systems
    $zopts = array();
    $zopts['aleph'] = array('syntax' => '', 'yaz_con_opts' => array('piggyback' => true));
    $zopts['bibliofil'] = array('syntax' => 'normarc', 'yaz_con_opts' => array('piggyback' => true));
    $zopts['bibsys'] = array('syntax' => '', 'yaz_con_opts' => array('piggyback' => false));
    $zopts['koha'] = array('syntax' => '', 'yaz_con_opts' => array('piggyback' => true));
    $zopts['mikromarc'] = array('syntax' => 'normarc', 'yaz_con_opts' => array('piggyback' => true));
    /*
    The Glitre project has not been able to find sample servers fot these
    systems, even after asking the vendors if any exist:
    
    $zopts['reindex'] = array(
      'syntax' => '', 
      'yaz_con_opts' => array(
    	'piggyback' => false,
      ),
    );
    $zopts['tidemann'] = array(
      'syntax' => '', 
      'yaz_con_opts' => array(
    	'piggyback' => false,
      ),	
    );
    */
    $hits = 0;
    $type = 'xml';
    $id = yaz_connect($config['lib']['z3950'], $zopts[$system]['yaz_con_opts']);
    yaz_element($id, "F");
    yaz_syntax($id, $zopts[$system]['syntax']);
    yaz_range($id, 1, 1);
    yaz_ccl_conf($id, get_zconfig());
    $cclresult = array();
    if (!yaz_ccl_parse($id, $ccl, $cclresult)) {
        echo 'Error yaz_ccl_parse: ' . $cclresult["errorstring"];
    } else {
        // Norwegian Z39.50 have no or limited support for yaz_sort
        // See http://wiki.biblab.no/index.php/Z39.50%2C_SRU_og_sortering for details
        // yaz_sort($id, "1=31 di");
        $rpn = $cclresult["rpn"];
        yaz_search($id, "rpn", utf8_decode($rpn));
    }
    yaz_wait();
    $error = yaz_error($id);
    if (!empty($error)) {
        $yaz_errno = yaz_errno($id);
        // echo "<p>Error yaz_wait: $error ($yaz_errno)</p>";
        $error = array('error' => true, 'stage' => 'yaz_wait', 'desc' => $error, 'num' => $yaz_errno);
        return $error;
    } else {
        $hits = yaz_hits($id);
    }
    $data = array();
    for ($p = 1; $p <= $hits; $p++) {
        $rec = yaz_record($id, $p, $type);
        if (empty($rec)) {
            continue;
        }
        $data[] = $rec;
        // If a max number of records is set for this library, respect it - otherwise use the default.
        $records_max = $config['lib']['records_max'] ? $config['lib']['records_max'] : $config['records_max'];
        if ($p == $records_max) {
            break;
        }
    }
    $ret = array("hits" => $hits, "result" => $data);
    return $ret;
}

 switch ($_GET['field']) {
     case 'ti':
         $query = '@or @and @attr 1=4 ' . $keywords . ' @and @attr 1=5 ' . $keywords;
         break;
     case 'au':
         $query = '@attr 1=1 @and ' . $keywords;
         break;
     default:
         $query = '@or @attr 1=7 ' . $keywords . ' @attr 1=8 ' . $keywords;
         break;
 }
 for ($h = 0; $h < $num_hosts; $h++) {
     $id[] = yaz_connect($zserver[$h]);
     yaz_syntax($id[$h], 'usmarc');
     yaz_range($id[$h], 1, $sysconf['z3950_max_result']);
     yaz_search($id[$h], 'rpn', $query);
 }
 yaz_wait();
 // preparing to buffer MARC XML result
 $errors = array();
 $hits = 0;
 ob_start();
 echo '<?xml version="1.0" standalone="yes"?>' . "\n";
 echo '<collection xmlns="http://www.loc.gov/MARC21/slim">' . "\n";
 for ($h = 0; $h < $num_hosts; $h++) {
     $error = yaz_error($id[$h]);
     if (!empty($error)) {
         $errors[] = $error;
     } else {
         // number of results
         $hits = yaz_hits($id[$h]);

    $aUser = $postVars[hosts][$ptr][user];
    $aPw = $postVars[hosts][$ptr][pw];
    $connOK = yaz_connect($aHost, array("user" => $aUser, "password" => $aPw));
    if (!$connOK) {
        echo 'yaz setup not successful! <br />';
        trigger_error($lookLoc->getText("lookup_yaz_setup_failed") . $postVars[hosts][$ptr][name] . "<br />", E_USER_ERROR);
    } else {
        //echo 'yaz setup successful! <br />';
        $id[$ptr] = $connOK;
        $db = $postVars[hosts][$ptr][db];
        //echo "specifying db: $db<br />";
        yaz_database($id[$ptr], $db);
        yaz_syntax($id[$ptr], $syntax);
        yaz_element($id[$ptr], "F");
        //echo "sending: $qry <br />";
        if (!yaz_search($id[$ptr], $srchType, $qry)) {
            trigger_error($lookLoc->getText("lookup_badQuery") . "<br />", E_USER_NOTICE);
        }
    }
}
$waitOpts = array("timeout" => $postVars[timeout]);
//echo "<br /> waiting $waitOpts[timeout] seconds for responses. <br />";
//yaz_wait($waitOpts);
yaz_wait();
$ttlHits = 0;
for ($i = 0; $i < $numHosts; $i++) {
    ## did we make it?
    //			$ptr = ($useHost == -1)?$i:$useHost;
    $ptr = $i;
    $error = yaz_error($id[$ptr]);
    if (!empty($error)) {

        // save the $id to be able later to retrieve the records from the servers
        //////////////////////////////////////////////////////////////////////////////////
        //$stato[$bib_id] = 1;
        $auth = $auth_user . $auth_pass;
        if ($auth != "") {
            $id = yaz_connect("{$url}:{$port}/{$base}", array("user" => $auth_user, "password" => $auth_pass, "piggyback" => false)) or affiche_jsscript($msg['z3950_echec_cnx'], "z3950_failed", $bib_id);
        } else {
            $id = yaz_connect("{$url}:{$port}/{$base}", array("piggyback" => false)) or affiche_jsscript($msg['z3950_echec_cnx'], "z3950_failed", $bib_id);
        }
        $map[$bib_id] = $id;
        yaz_element($id, "F");
        $etrange_limite = $limite_notices;
        yaz_range($id, 1, $etrange_limite);
        yaz_syntax($id, strtolower($format));
        echo $term;
        yaz_search($id, "rpn", $term);
    }
}
///////////////////////////////////////////////////////////////////////////
// Fase 2: all the possible connections are ready now start the researches
//////////////////////////////////////////////////////////////////////////
//Correction mystérieuse : visiblement la fonction yaz_search impacte la variable global $limite... modifié en $limite_notices
affiche_jsscript($msg['z3950_zmsg_wait'], "", $mioframe);
$options = array("timeout" => 45);
$t1 = time();
//Override le timeout du serveur mysql, pour être sûr que le socket dure assez longtemps pour aller jusqu'aux ajouts des résultats dans la base.
$sql = "set wait_timeout = 120";
pmb_mysql_query($sql);
yaz_wait($options);
$dt = time() - $t1;
$msgz = str_replace('!!time!!', $dt, $msg['z3950_zmsg_endw']);

                Bibhit
                <input type="checkbox" checked="1" name="host[]" value="blpcz.bl.uk:21021/BLPC-ALL">
                British Library
<br>
RPN Query:
<input type="text" size="30" name="term">
<input type="submit" name="action" value="Search">
        ';        
    }
    else
    {
        echo 'You searced for ' . htmlspecialchars($term) . '<br>';
        for ($i = 0; $i < $num_hosts; $i++) {
            $id[] = yaz_connect($host[$i]);
            yaz_syntax($id[$i],"sutrs");
            yaz_search($id[$i],"rpn",$term);
        }
        yaz_wait();
        for ($i = 0;  $i <$num_hosts; $i++)
        {
            echo '<hr>' . $host[$i] . ":";
            $error = yaz_error($id[$i]);
            if (!empty($error)) {
                echo "Error: $error";
            } else {
                $hits = yaz_hits($id[$i]);
                echo "Result Count $hits";
            }
            echo '<dl>';
            for ($p = 1; $p <= 10; $p++)
            {

 /** 
  * Fetch details about a specific item from WorldCat data service 
  *
  * @param array $pa_settings Plugin settings values
  * @param string $ps_url The URL originally returned by the data service uniquely identifying the item
  * @param array $pa_options Options include:
  *		APIKey = WorldCat API key to use. [Default is the key configured in worldcat_api_key in app.conf]
  *		user = Worldcat Z39.50 login name. [Default is the username configured in worldcat_z39.50_user in app.conf]
  *		password = WorldCAt Z39.50 password. [Default is the password configured in worldcat_z39.50_password in app.conf]
  *
  * @return array An array of data from the data server defining the item.
  */
 public function getExtendedInformation($pa_settings, $ps_url, $pa_options = null)
 {
     $va_config = $this->_getConfiguration($pa_settings, $pa_options);
     $va_tmp = explode("/", $ps_url);
     $vn_worldcat_id = array_pop($va_tmp);
     $va_data = array();
     if ($va_config['user'] && $va_config['z39IsAvailable']) {
         $r_conn = yaz_connect(WLPlugInformationServiceWorldCat::$s_worldcat_z3950_host, array('user' => $va_config['user'], 'password' => $va_config['password']));
         yaz_syntax($r_conn, "usmarc");
         yaz_range($r_conn, $vn_start + 1, $vn_start + $vn_count);
         yaz_search($r_conn, "rpn", '@attr 1=12 @attr 4=2 "' . str_replace('"', '', $vn_worldcat_id) . '"');
         yaz_wait();
         $vs_data = yaz_record($r_conn, 1, "xml; charset=marc-8,utf-8");
     } else {
         $o_client = new Client(WLPlugInformationServiceWorldCat::$s_worldcat_detail_url);
         try {
             if (!$va_config['curlIsAvailable']) {
                 throw new Exception(_t('CURL is required for WorldCat web API usage but not available on this server'));
             }
             if (!$va_config['APIKey']) {
                 if (!$va_config['z39IsAvailable']) {
                     throw new Exception(_t('Neither Z39.50 client is installed nor is WorldCat web API key configured'));
                 } else {
                     throw new Exception(_t('WorldCat web API key is not configured'));
                 }
             }
             // Create a request
             $o_request = $o_client->get("{$vn_worldcat_id}?wskey=" . $va_config['APIKey']);
             // Send the request and get the response
             $o_response = $o_request->send();
             $vs_data = (string) $o_response->getBody();
         } catch (Exception $e) {
             return array('display' => _t('WorldCat data could not be loaded: %1', $e->getMessage()));
         }
     }
     try {
         if (!$vs_data) {
             throw new Exception("No data returned");
         }
         $xml = new DOMDocument();
         $xml->loadXML($vs_data);
     } catch (Exception $e) {
         return array('display' => _t('WorldCat data could not be parsed: %1', $e->getMessage()));
     }
     switch ($pa_settings['detailStyle']) {
         case 'labels':
         default:
             $vs_template = file_get_contents(__CA_LIB_DIR__ . "/core/Plugins/InformationService/WorldCat/MARC21slim2English.xml");
             break;
         case 'codes':
             $vs_template = file_get_contents(__CA_LIB_DIR__ . "/core/Plugins/InformationService/WorldCat/MARC21slim2HTML.xml");
             break;
         case 'template':
             $vs_template = $pa_settings['detailXSLTemplate'];
             break;
     }
     try {
         $xsl = new DOMDocument();
         $xsl->loadXML($vs_template);
     } catch (Exception $e) {
         return array('display' => _t('WorldCat detail display template could not be parsed: %1', $e->getMessage()));
     }
     try {
         $proc = new XSLTProcessor();
         $proc->importStyleSheet($xsl);
         $vs_output = $proc->transformToXML($xml);
         $va_data = array('display' => $vs_output);
     } catch (Exception $e) {
         return array('display' => _t('WorldCat detail display template could not be created: %1', $e->getMessage()));
     }
     return $va_data;
 }

<?php

$z = yaz_connect("localhost:9999");
yaz_range($z, 1, 2);
yaz_search($z, "rpn", "computer");
yaz_wait();
$error = yaz_error($z);
if (!empty($error)) {
    echo "Error: {$error}\n";
} else {
    $hits = yaz_hits($z);
    echo "Result count {$hits}\n";
    for ($p = 1; $p <= 2; $p++) {
        $rec = yaz_record($z, $p, "string");
        if (empty($rec)) {
            break;
        }
        echo "----- {$p} -----\n{$rec}";
    }
}

function do_search_and_show_hits()
{
    output_header("Search Results");
    echo "<br>";
    if (empty($_GET['start'])) {
        $start = 1;
    } else {
        $start = $_GET['start'];
    }
    if (!empty($_GET['fq'])) {
        $fullquery = unserialize(base64_decode($_GET['fq']));
    } else {
        $fullquery = query_format();
    }
    global $external_catalog_locator;
    $id = yaz_connect($external_catalog_locator);
    yaz_syntax($id, "usmarc");
    yaz_element($id, "F");
    yaz_search($id, "rpn", trim($fullquery));
    $extra_options = array("timeout" => 60);
    yaz_wait($extra_options);
    $errorMsg = yaz_error($id);
    if (!empty($errorMsg)) {
        echo "<center>";
        echo _("The following error has occurred:");
        echo "<br><br>";
        echo "<b><i>{$errorMsg}</i></b>";
        echo "<p>";
        $url = "editproject.php?action=createnew";
        echo sprintf(_("Please try again. If the problem recurs, please create your project manually by following this <a href='%s'>link</a>."), $url);
        echo "</center>";
        exit;
    }
    echo "<center>";
    if (yaz_hits($id) == 0) {
        echo "<b>";
        echo _("There were no results returned.");
        echo "</b>";
        echo "<br>";
        echo _("Please search again or click 'No Matches' to create the project manually.");
        echo "<br>";
    } else {
        echo "<b>";
        echo sprintf(_("%d results returned. Note that some non-book results may not be displayed."), yaz_hits($id));
        echo "<br>";
        echo _("Please pick a result from below:");
        echo "</b>";
    }
    echo "</center>";
    echo "<br><form method='post' action='editproject.php'>";
    echo "<input type='hidden' name='action' value='create_from_marc_record'>";
    echo "<table border='0 width='100%' cellpadding='0' cellspacing='0'>";
    // -----------------------------------------------------
    $hits_per_page = 20;
    // Perhaps later this can be a PM preference or an option on the form.
    $i = 1;
    while ($start <= yaz_hits($id) && $i <= $hits_per_page) {
        $rec = yaz_record($id, $start, "array");
        //if it's not a book don't display it.  we might want to uncomment in the future if there are too many records being returned - if (substr(yaz_record($id, $start, "raw"), 6, 1) != "a") { $start++; continue; }
        $marc_record = new MARCRecord();
        $marc_record->load_yaz_array($rec);
        if ($i % 2 == 1) {
            echo "<tr>";
        }
        echo "<td width='5%' align='center' valign='top'>";
        echo "<input type='radio' name='rec' value='" . base64_encode(serialize($rec)) . "'>";
        echo "</td>";
        echo "<td width='45%' align='left' valign='top'>";
        echo "<table border='0' width='100%' cellpadding='0' cellspacing='0'>";
        foreach (array(array('label' => _("Title"), 'value' => $marc_record->title), array('label' => _("Author"), 'value' => $marc_record->author), array('label' => _("Publisher"), 'value' => $marc_record->publisher), array('label' => _("Language"), 'value' => $marc_record->language), array('label' => _("LCCN"), 'value' => $marc_record->lccn), array('label' => _("ISBN"), 'value' => $marc_record->isbn)) as $couple) {
            $label = $couple['label'];
            $value = $couple['value'];
            echo "<tr>";
            echo "<td width='20%' align='left' valign='top'><b>{$label}</b>:</td>";
            echo "<td align='left' valign='top'>{$value}</td>";
            echo "</tr>\n";
        }
        echo "</table><p></td>";
        if ($i % 2 != 1) {
            echo "</tr>\n";
        }
        $i++;
        $start++;
    }
    if ($i % 2 != 1) {
        echo "</tr>\n";
    }
    // -----------------------------------------------------
    $encoded_fullquery = base64_encode(serialize($fullquery));
    echo "<tr>";
    echo "<td colspan='2' width='50%' align='left' valign='top'>";
    if (isset($_GET['start']) && $_GET['start'] - $hits_per_page > 0) {
        $url = "external_catalog_search.php?action=do_search_and_show_hits&start=" . ($_GET['start'] - $hits_per_page) . "&fq={$encoded_fullquery}";
        echo "<a href='{$url}'>Previous</a>";
    } else {
        echo "&nbsp;";
    }
    echo "</td>";
    echo "<td colspan='2' width='50%' align='right' valign='top'>";
    if ($start + $hits_per_page <= yaz_hits($id)) {
//.........这里部分代码省略.........

 function doZSearch($zid, $rpn, $start, $number)
 {
     yaz_range($zid, (int) $start, (int) $number);
     yaz_syntax($zid, $this->z_syntax);
     if ($this->z_sort) {
         yaz_sort($zid, $this->z_sort);
     }
     yaz_element($zid, 'F');
     yaz_search($zid, "rpn", $rpn);
     yaz_wait($options = array('timeout' => $this->z_timeout));
     if (yaz_errno($zid)) {
         $error_msg = yaz_error($zid);
         if ($error_info = yaz_addinfo($zid)) {
             $error_msg .= ' - ' . $error_info;
         }
         $this->addError("error", sprintf(_("Fehler bei der Suche: %s"), $error_msg));
         return false;
     } else {
         return yaz_hits($zid);
     }
 }

function yazCclArray($ccl, $syntax = 'marc21', $host = 'default')
{
    global $config;
    if ($host == 'default') {
        $host = $config['libraries'][$_GET['bib']]['z3950'];
    }
    $zconfig = get_zconfig();
    $hits = 0;
    $type = 'xml';
    $id = yaz_connect($host);
    yaz_element($id, "F");
    yaz_syntax($id, $syntax);
    yaz_range($id, 1, 1);
    yaz_ccl_conf($id, $zconfig);
    $cclresult = array();
    if (!yaz_ccl_parse($id, $ccl, $cclresult)) {
        echo 'Error: ' . $cclresult["errorstring"];
    } else {
        // NB! Ser ikke ut som Z39.50 fra Bibliofil støtter "sort"
        // Se nederst her: http://www.bibsyst.no/produkter/bibliofil/z3950.php
        // PHP/YAZ-funksjonen yaz-sort ville kunne dratt nytte av dette:
        // http://no.php.net/manual/en/function.yaz-sort.php
        // Sort Flags
        // a Sort ascending
        // d Sort descending
        // i Case insensitive sorting
        // s Case sensitive sorting
        // Bib1-attributter man kunne sortert på:
        // http://www.bibsyst.no/produkter/bibliofil/z/carl.xml
        // yaz_sort($id, "1=31 di");
        $rpn = $cclresult["rpn"];
        yaz_search($id, "rpn", utf8_decode($rpn));
    }
    yaz_wait();
    $error = yaz_error($id);
    if (!empty($error)) {
        echo "Error yazCclArray: {$error}";
    } else {
        $hits = yaz_hits($id);
    }
    $data = array();
    for ($p = 1; $p <= $hits; $p++) {
        $rec = yaz_record($id, $p, $type);
        if (empty($rec)) {
            continue;
        }
        $data[] = $rec;
        if ($p == $config['maks_poster']) {
            break;
        }
    }
    $ret = array("hits" => $hits, "result" => $data);
    return $ret;
}

 }
 if ($fullquery != "" && $expr_isbn != "") {
     $fullquery = "@or " . $expr_isbn . " " . $fullquery;
 } else {
     if ($expr_isbn != "") {
         $fullquery = $expr_isbn;
     }
 }
 //    $options=array("proxy"=>"localhots");
 $options = array();
 for ($reintentar = 0; $reintentar <= $intentos; $reintentar++) {
     for ($i = 0; $i < $num_hosts; $i++) {
         $id = yaz_connect($host[$i], $options);
         $ids[$i] = $id;
         if ($id <= 0) {
             continue;
         }
         if (!yaz_search($id, "rpn", $fullquery)) {
             echo $msgstr["expr_err"] . '<br>';
             $reintentar = 999;
             break;
         }
         if ($number > 1) {
             yaz_element($id, $element);
         } else {
             yaz_element($id, "F");
         }
         yaz_syntax($id, $syntax);
         yaz_range($id, $start, $number);
     }
     yaz_wait();

if (isset($_REQUEST['bib_id'])) {
    // Simple sanitizing of input
    $bib_id = preg_replace("/[^a-zA-Z0-9 ]+/", "", $_REQUEST['bib_id']);
    header('Content-Type: text/xml');
    header('Content-Disposition: inline; filename="' . $bib_id . '.xml";');
    $bib_id = '@attr 1=12 ' . $bib_id;
    // The backend server can be unreliable, so we'll try connecting multiple
    // times if we get an erroneous response.
    $xml_string;
    $maxTries = 5;
    for ($try = 1; $try <= $maxTries; $try++) {
        $id = yaz_connect($host);
        yaz_syntax($id, "usmarc");
        yaz_range($id, 1, 1);
        $host_options = array("timeout" => "10");
        yaz_search($id, "rpn", $bib_id);
        yaz_wait($host_options);
        $error = yaz_error($id);
        if (empty($error)) {
            // Successful Z39.50 Connection
            $rec = yaz_record($id, 1, 'xml');
            if (!empty($rec)) {
                // Successul record retrieval
                http_response_code(200);
                $doc = new DOMDocument();
                $doc->loadXML($rec);
                $doc->formatOutput = true;
                $xml_string = $doc->saveXML();
                break;
            } else {
                // No record