The following simple PHP coded page connects to the PI Web API and then outputs the list of AF Databases for your target AF Server to a webpage:

<!DOCTYPE html>
<html>
<head>
<title>List AF Databases</title>
<style>     
     body { margin-left: 5%; margin-right: 5%; }
     span {font-family: Courier New; }
</style>
</head>
<body>


<?php
  //~ List of AF Databases:
  $url_root = "https://{{YOUR_DEVICE_NAME}}/piwebapi/";
  $prefix = "assetservers";
  $webId = "{{YOUR_AF_SERVER_WEBID}}";
  $extension = "assetdatabases";
  $json = file_get_contents($url_root . $prefix . "/" . $webId . "/" . $extension); //~ Get the JSON data from PI Web API
  $obj = json_decode($json); //~ decode the JSON data for use in PHP

  $length = count($obj->Items);
  for ($i=0; $i < $length; $i++){
  echo "<h2>";
  echo "Database Name: <span>" . $obj->Items[$i]->Name . "</span>";
  echo "</h2>";
  echo "<p>";
  echo "WebId: <span>" . $obj->Items[$i]->WebId . "</span><br>";
  echo "Path: <span>" . $obj->Items[$i]->Path . "</span><br>";
  echo "</p>";
  echo "<hr>";
  }
?>



</body>
</html>