There are three classes: eDirectory, which is basically an abstract class; eDirectorySearch, which allows you to search for various objects in the tree; and eDirectoryAppObject, which knows about Application Objects (ZEN) types in eDirectory

The Classes

<?php
/* Copyright Kieran Whitbread 2006 */

/* This file is released under the following license: http://opensource.org/licenses/lgpl-2.1.php GNU Lesser General Public License */

class eDirectory
{
	var $connection = NULL;
	var $binding = NULL;
	var $server = NULL;

	function eDirectory($server='localhost')
	{
		$this->__construct($server);
	}
	function __construct($server='localhost')
	{
		$this->server = $server;
		$this->connection = ldap_connect($this->server);
		if ($this->connection)
		{
			$this->binding = ldap_bind($this->connection);
			if ($this->binding)
			{
				ldap_set_option($this->connection, LDAP_OPT_DEREF, LDAP_DEREF_ALWAYS);
				ldap_set_option($this->connection, LDAP_OPT_PROTOCOL_VERSION, 3);
			}
			else
			{
				error_log('Could not bind to server '.get_class().', '.__FILE__);
			}
		}
	}
	function __destruct()
	{
		ldap_unbind($this->connection);
	}
	function GetErrorMessage()
	{
		return ldap_error($this->connection);
	}
}

class eDirectorySearch extends eDirectory
{
	var $filter = NULL;
	var $baseDn = NULL;
	var $ldapObjectAttributes = NULL;
	var $ldapSearchResultsResource = NULL;
	var $currentResult = false;
	var $currentResultAttributes = NULL;
	
	function eDirectorySearch($filter, $baseDn, $ldapObjectAttributes)
	{
		$this->__construct($filter, $baseDn, $ldapObjectAttributes);
	}
	function __construct($filter, $baseDn, $ldapObjectAttributes)
	{
		parent::__construct();
		$this->SetFilter($filter);
		$this->SetBaseDn($baseDn);
		$this->ldapObjectAttributes = $ldapObjectAttributes;
	}
	function __destruct()
	{
		parent::__destruct();
	}
	function GetAttribute($attribute, $index=false)
	{
		if (!isset($this->currentResultAttributes) || !isset($this->currentResultAttributes[$attribute]))
		{
			return NULL;
		}
		else
		if ($index)
		{
			return $this->currentResultAttributes[$attribute][$index];
		}
		else
		{
			return $this->currentResultAttributes[$attribute];
		}
	}
	function NextResult()
	{
		if ($this->connection && $this->ldapSearchResultsResource)
		{
			if (!$this->currentResult) $this->currentResult = ldap_first_entry($this->connection, $this->ldapSearchResultsResource);
			else $this->currentResult = ldap_next_entry($this->connection, $this->ldapSearchResultsResource);
			if ($this->currentResult) 
			{
				$this->currentResultAttributes = ldap_get_attributes($this->connection, $this->currentResult);
				return true;
			}
		}
		$this->currentResultAttributes = NULL;
		$this->currentResult = NULL;
		$this->ldapSearchResultsResource = NULL;
		return false;
	}
	function Search()
	{
		$this->ldapSearchResultsResource = ldap_search($this->connection, $this->baseDn, $this->filter, $this->ldapObjectAttributes);
	}
	function SetBaseDn($baseDn)
	{
		$this->baseDn = $baseDn;
	}
	function SetFilter($filter)
	{
		$this->filter = $filter;
	}
	function SetLdapObjectAttributes($ldapObjectAttributes)
	{
		if (is_array($ldapObjectAttributes))
		{
			$this->ldapObjectAttributes = $ldapObjectAttributes;
		}
	}
}
class eDirectoryAppObjects extends eDirectorySearch
{
	var $applications = array();
	
	function eDirectoryAppObjects($baseDn)
	{
		$this->__construct($baseDn);
	}
	
	function __construct($baseDn)
	{
		$filter = '(objectclass=AppApplication)';
		$ldapObjectAttributes = array( 
										'appdescription',
										'appadministratornotes', 
										'appcaption',
										'appfolderobjects',
										'creatorsname',
									);
		parent::__construct($filter, $baseDn, $ldapObjectAttributes);
	}
	
	function GetApplications()
	{
		$this->Search();
		if ($application = ldap_first_entry($this->connection, $this->ldapSearchResultsResource))
		{
			$count = 0;
			do
			{
				$caption = @ldap_get_values($this->connection, $application, 'appcaption');
				$caption = $caption[0];
				
				$description = @ldap_get_values($this->connection, $application, 'appdescription');
				$description = $description[0];
				
				$adminnotes = @ldap_get_values($this->connection, $application, 'appadministratornotes');
				$adminnotes = $adminnotes[0];
				
				$appfolders = @ldap_get_values($this->connection, $application, 'appfolderobjects');
				
				$creator = @ldap_get_values($this->connection, $application, 'creatorsname');
				$creator = $creator[0];
				
				$dn = ldap_get_dn($this->connection, $application);
				$dn = ldap_explode_dn($dn, 0);
				
				$this->applications[$count] = array(
												'Distinguished Name' => $dn,
												'Caption' => $caption,
												'Description' => $description,
												'Administrator Notes' => $adminnotes,
												'Application Folders' => $appfolders,
												'Creator' => $creator,
											);
				$count++;
			}
			while ($application = ldap_next_entry($this->connection, $application));
		}
	}
}

Usage Example

Here's a really simple script which generates a report of application objects in eDirectory:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>Application Objects Report - prototype</title>
</head>

<body>
<?php
require_once 'edir.classes.inc.php';
$appObjects = new eDirectoryAppObjects('ou=learner,o=vsfc');
$appObjects->GetApplications();
echo '<pre>';
print_r($appObjects->applications);
echo '</pre>';
if ($appObjects->binding) echo '<p>OK</p>';
?>
</body>
</html>

</nowiki>