DisplayUsers.php

<?php
    include("PhpSampleTemplate.php");
    require_once 'Settings.php';
?>

<HTML>
    <head>
        <title>
            Administration Page For Users
        </title>
        <link rel="stylesheet" type="text/css" href="StyleSheet.css" />
    </head>
    <BODY>
        <h1>
            /Users
        </h1>  
        <a href="CreateUser.php"><b>Create And Add A New User</b></a>    
        <br/><br/>
        <table id="directoryObjects">
            <tr>
            <th>Display Name</th>
            <th>Email</th>
            <th>Title</th>
            <th>Skype Account</th>
            <th>Edit Link</th>
            </tr>  
            <?php
                $users = GraphServiceAccessHelper::getFeed('users');    
                foreach ($users as $user){
                    $editLinkValue = "EditUser.php?id=".$user->objectId;
                    $skypeAccount = isset($user->{Settings::$skypeExtension})
                     ?  '<a href="skype:'.$user->{Settings::$skypeExtension}.'?call">'.$user->{Settings::$skypeExtension}.'</a>'
                     : "not set";
                    echo('<tr><td>'. $user->{'displayName'}. '</td><td>'. $user->{'userPrincipalName'} .'</td><td>'. $user->{'jobTitle'} .'</td>');
                    echo ('<td>'.$skypeAccount.'</td>');
                    echo('<td>' .'<a href=\''.$editLinkValue.'\'>'. 'Edit User' . '</a></td></tr>');
                }
            ?>
        </table>
    </BODY>
</HTML>