Reformat and enhance the page that shows individual metadata entities.

modules/core/templates/show_metadata.tpl.php

-<?php 
-
-$this->includeAtTemplateBase('includes/header.php'); 
+<?php
+$this->includeAtTemplateBase('includes/header.php');
 ?>
-<pre class="metadatabox">
+<div class="metadatabox">
+    <button data-clipboard-target="#metadata" id="btncp" class="btn topright" style="margin-right: 0.5em;">
+        <img src="<?php echo $this->data['baseurlpath'].'/resources/icons/clipboard.svg'; ?>"
+             alt="Copy to clipboard">
+    </button>
+    <pre id="metadata">
 $metadata['<?php echo $this->data['m']['metadata-index']; unset($this->data['m']['metadata-index']) ?>'] => <?php
     echo htmlspecialchars(var_export($this->data['m'], true));
 ?>
-</pre>
-<p>[ <a href="<?php echo $this->data['backlink']; ?>">back</a> ]</p>
+    </pre>
+</div>
+<script type="text/javascript">
+    var clipboard = new Clipboard('#btncp');
+</script>
+<br/>
+<p><a href="<?php echo $this->data['backlink']; ?>"><span class="btn">Back</span></a></p>
 
 <?php
-$this->includeAtTemplateBase('includes/footer.php'); 
-
+$this->includeAtTemplateBase('includes/footer.php');

modules/core/www/show_metadata.php

 <?php
 
-
-
-/* Load simpleSAMLphp, configuration */
+// load configuration
 $config = SimpleSAML_Configuration::getInstance();
 $session = SimpleSAML_Session::getSessionFromRequest();
 
 SimpleSAML\Utils\Auth::requireAdmin();
 
-
-if (!array_key_exists('entityid', $_REQUEST))
-	throw new Exception('required parameter [entityid] missing');
-if (!array_key_exists('set', $_REQUEST))
-	throw new Exception('required parameter [set] missing');
-if (!in_array($_REQUEST['set'], array('saml20-idp-remote', 'saml20-sp-remote', 'shib13-idp-remote', 'shib13-sp-remote')))
-	throw new Exception('Invalid set');
-
+if (!array_key_exists('entityid', $_REQUEST)) {
+    throw new Exception('required parameter [entityid] missing');
+}
+if (!array_key_exists('set', $_REQUEST)) {
+    throw new Exception('required parameter [set] missing');
+}
+if (!in_array(
+    $_REQUEST['set'],
+    array('saml20-idp-remote', 'saml20-sp-remote', 'shib13-idp-remote', 'shib13-sp-remote')
+)) {
+    throw new Exception('Invalid set');
+}
 
 $metadata = SimpleSAML_Metadata_MetaDataStorageHandler::getMetadataHandler();
 
 $m = $metadata->getMetadata($_REQUEST['entityid'], $_REQUEST['set']);
 
 $t = new SimpleSAML_XHTML_Template($config, 'core:show_metadata.tpl.php');
+$t->data['clipboard.js'] = true;
 $t->data['pageid'] = 'show_metadata';
 $t->data['header'] = 'simpleSAMLphp Show Metadata';
 $t->data['backlink'] = SimpleSAML_Module::getModuleURL('core/frontpage_federation.php');
 $t->data['m'] = $m;
 
-
 $t->show();
-