simple-oai-pmh/listmetadataformats.php

<?php
/**
 * \file
 * \brief Response to Verb ListMetadataFormats
 *
 * The information of supported metadata formats is saved in database and retrieved by calling function <B>idFormatQuery</B>.
 * \sa idFormatQuery
 */

/**
 * Add a metadata format node to an ANDS_Response_XML
 * \param &$outputObj
 *	type: ANDS_Response_XML. The ANDS_Response_XML object for output.
 * \param $key
 * 	type string. The name of new node.
 * \param $val
 * 	type: array. Values accessable through keywords 'schema' and 'metadataNamespace'.
 *
 */
function addMetedataFormat(&$outputObj,$key,$val) {
    $cmf = $outputObj->add2_verbNode("metadataFormat");
    $outputObj->addChild($cmf,'metadataPrefix',$key);
    $outputObj->addChild($cmf,'schema',$val['schema']);
    $outputObj->addChild($cmf,'metadataNamespace',$val['metadataNamespace']);
}

if (isset($args['identifier'])) {
    $identifier = $args['identifier'];
    $query = idFormatQuery($identifier);
    $res = $db->query($query);
    if ($res==false) {
        if (SHOW_QUERY_ERROR) {
            echo __FILE__.','.__LINE__."<br />";
            echo "Query: $query<br />\n";
            die($db->errorInfo());
        } else {
            $errors[] = oai_error('idDoesNotExist','', $identifier);
        }
    } else {
        $record = $res->fetch();
        if($record===false) {
            $errors[] = oai_error('idDoesNotExist', '', $identifier);
        } else {
            $mf = explode(",",$record[$SQL['metadataPrefix']]);    
        }
    }
}

//break and clean up on error
if (!empty($errors)) oai_exit();

$outputObj = new ANDS_Response_XML($args);
if (isset($mf)) {
    foreach($mf as $key) {
        $val = $METADATAFORMATS[$key];
        addMetedataFormat($outputObj,$key, $val);
    }
} elseif (is_array($METADATAFORMATS)) {
    foreach($METADATAFORMATS as $key=>$val) {
        addMetedataFormat($outputObj,$key, $val);
    }
} else { // a very unlikely event
    $errors[] = oai_error('noMetadataFormats'); 
    oai_exit();
}