diff --git a/docs/example/geolocation_div.php b/docs/example/geolocation_div.php
index b657f51..0fbaafa 100644
--- a/docs/example/geolocation_div.php
+++ b/docs/example/geolocation_div.php
@@ -1,64 +1,76 @@
 <?php
-/*
-Fragment zum Aufbau des rex-map-HTML
+/**
+ * Fragment zum Aufbau des rex-map-HTML als <div>.
+ *
+ * Es finden nur formale Prüfungen statt. Fehlende Werte werden nicht durch Defaults ersetzt.
+ * Hier wird aus Eingangsdaten HTML gebaut, mehr nicht.
+ *
+ * <div rex-map dataset="..." mapset="..." map="..."></div>
+ */
 
-Es finden nur formale Prüfungen statt. Fehlende Werte werden nicht durch Defaults ersetzt.
-Hier wird aus Eingangsdaten HTML gebaut, mehr nicht.
+namespace Geolocation;
+
+/**
+ * @var \rex_fragment $this
+ */
 
-<rex-map dataset="..." mapset="..." map="..."></rex-map>
-*/
 $classes = [];
 $attributes = [];
 
 // dataset muss ein Array sein
-if( isset($this->dataset) && is_array($this->dataset) ) {
+if (isset($this->dataset) && \is_array($this->dataset)) {
     $attributes['dataset'] = json_encode($this->dataset);
 }
 
 // mapset muss ein Array sein
-if( isset($this->mapset) && is_array($this->mapset) ) {
+if (isset($this->mapset) && \is_array($this->mapset)) {
     $attributes['mapset'] = json_encode($this->mapset);
 }
 
 // map (Kartenoptionen) muss ein Array sein
-if( isset($this->map) && is_array($this->map) ) {
+if (isset($this->map) && \is_array($this->map)) {
     $attributes['map'] = json_encode($this->map);
 }
 
 // Klassen hinzufügen (string oder array)
-if( isset($this->class) ) {
+if (isset($this->class)) {
     $class = $this->class;
-    if( is_string($class) && $class) $class = explode(' ',$class);
-    if( is_array($class) && $class ) $classes = array_merge($classes,$class);
+    if (\is_string($class)) {
+        $class = explode(' ', $class);
+    }
+    if (\is_array($class)) {
+        $classes = array_merge($classes, $class);
+    }
 }
-if( $classes ) {
+$classes = array_filter($classes, 'trim');
+if (0 < \count($classes)) {
     $attributes['class'] = array_unique($classes);
 }
 
 // Schript-Code für Events einfügen
-if( isset($this->events) && is_array($this->events) && count($this->events) ) {
+if (isset($this->events) && \is_array($this->events) && 0 < \count($this->events)) {
     $code = '';
-    $id = 'rm'.md5( microtime() );
-    foreach( $this->events as $k=>$v ) {
+    $id = 'rm'.md5(microtime());
+    foreach ($this->events as $k => $v) {
         $exit = 'if( !e.detail.container.hasAttribute(\''.$id.'\') ) return;';
         $code .= 'document.addEventListener(\'geolocation.'.$k.'\', function(e){'.$exit.'console.log(e);'.$v.'});';
     }
-    if( $code ) {
+    if ('' < $code) {
         echo '<script type="text/javascript">',$code,'</script>';
         $attributes[$id] = 1;
     }
 }
 
 // sonstige Attribute hinzufügen (class,dataset,mapset,map ignorieren)
-if( isset($this->attributes) && is_array($this->attributes) && count($this->attributes) ) {
+if (isset($this->attributes) && \is_array($this->attributes) && 0 < \count($this->attributes)) {
     $attributes = array_merge(
         $attributes,
-        array_diff_key($this->attributes,['mapset'=>null,'dataset'=>null,'map'=>null,'class'=>null])
+        array_diff_key($this->attributes, ['mapset' => null, 'dataset' => null, 'map' => null, 'class' => null])
     );
 }
 
 // HTML-Tag generieren
-$id = 'rm-' . md5(time());
+$id = 'rm-' . md5(microtime());
 ?>
 <script>
 document.addEventListener('DOMContentLoaded', (event) => {