localhost geht hop-fly nicht

php/php-dog/classes/ranStr.php

@@ -0,0 +1,26 @@
+<?php
+
+function random_str(
+    $length,
+    $keyspace = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
+) 
+{
+    $str = '';
+    $max = mb_strlen($keyspace, '8bit') - 1;
+    if ($max < 1) 
+    {
+        throw new Exception('$keyspace must be at least two characters long');
+    }
+    for ($i = 0; $i < $length; ++$i) 
+    {
+        $str .= $keyspace[random_int(0, $max)];
+    }
+    return $str;
+}
+
+
+
+
+echo random_str(20);
+
+?>