I am trying to learn how PHP interacts with the API through the 'Recipe' Demo using the Zend Framework. I have the latest version of the framework and I am running the latest version of PHP. It keeps telling me that the function link() is undefined in entry/atom.php. I tried testing first that it was indeed loading the file with the print("<font etc..... statement, and it is loading. However, the function link() is defined as a public function in the file, but it will not let me make a call to it whether in the file or outside of it. I defined a simple function in the file which does allow me to call. but any of the 'public' functions will not.

So my question is, why is the function not being defined?

CODE FOLLOWS

<?php print("<font size = '10'>HELLOa</font>"); function hello() { print("Hello");}

hello(); link(); /** * Zend Framework * * LICENSE * * This source file is subject to the new BSD license that is bundled * with this package in the file LICENSE.txt. * It is also available through the world-wide-web at this URL: *http://framework.zend.com/license/new-bsd * If you did not receive a copy of the license and are unable to * obtain it through the world-wide-web, please send an email * to lice...@zend.com so we can send you a copy immediately. * * @category Zend * @package Zend_Feed * @copyright Copyright (c) 2005-2007 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License * @version $Id:EntryAtom.php3941 2007-03-14 21:36:13Z darby $ */

/** * @see Zend_Feed_Entry_Abstract */ require_once 'Zend/Feed/Entry/Abstract.php';

/** * Concrete class for working with Atom entries. * * @category Zend * @package Zend_Feed * @copyright Copyright (c) 2005-2007 Zend Technologies USA Inc. (http://www.zend.com) * @license http://framework.zend.com/license/new-bsd New BSD License */ class Zend_Feed_Entry_Atom extends Zend_Feed_Entry_Abstract { /** * Root XML element for Atom entries. * * @var string */ protected $_rootElement = 'entry';

/** * Root namespace for Atom entries. * * @var string */ protected $_rootNamespace = 'atom';

/** * Delete an atom entry. * * Delete tries to delete this entry from its feed. If the entry * does not contain a link rel="edit", we throw an error (either * the entry does not yet exist or this is not an editable * feed). If we have a link rel="edit", we do the empty-body * HTTP DELETE to that URI and check for a response of 2xx. * Usually the response would be 204 No Content, but the Atom * Publishing Protocol permits it to be 200 OK. * * @throws Zend_Feed_Exception * @return void */ public function delete() { // Look for link rel="edit" in the entry object. $deleteUri = $this->link('edit'); if (!$deleteUri) { throw new Zend_Feed_Exception('Cannot delete entry; no link rel="edit" is present.'); }

// DELETE $client = Zend_Feed::getHttpClient(); do { $client->setUri($deleteUri); if (Zend_Feed::getHttpMethodOverride()) { $client->setHeader('X-HTTP-Method-Override', 'DELETE'); $response = $client->request('POST'); } else { $response = $client->request('DELETE'); } $httpStatus = $response->getStatus(); switch ((int) $httpStatus / 100) { // Success case 2: return true; // Redirect case 3: $deleteUri = $response->getHeader('Location'); continue; // Error default: throw new Zend_Feed_Exception("Expected response code 2xx, got $httpStatus"); } } while (true); }

/** * Save a new or updated Atom entry. * * Save is used to either create new entries or to save changes to * existing ones. If we have a link rel="edit", we are changing * an existing entry. In this case we re-serialize the entry and * PUT it to the edit URI, checking for a 200 OK result. * * For posting new entries, you must specify the $postUri * parameter to save() to tell the object where to post itself. * We use $postUri and POST the serialized entry there, checking * for a 201 Created response. If the insert is successful, we * then parse the response from the POST to get any values that * the server has generated: an id, an updated time, and its new * link rel="edit". * * @param string $postUri Location to POST for creating new entries. * @throws Zend_Feed_Exception * @return void */ public function save($postUri = null) { if ($this->id()) { // If id is set, look for link rel="edit" in the // entry object and PUT. $editUri = $this->link('edit'); if (!$editUri) { throw new Zend_Feed_Exception('Cannot edit entry; no link rel="edit" is present.'); }

$client = Zend_Feed::getHttpClient(); $client->setUri($editUri); if (Zend_Feed::getHttpMethodOverride()) { $client->setHeaders(array('X-HTTP-Method-Override: PUT', 'Content-Type: application/atom+xml')); $client->setRawData($this->saveXML()); $response = $client->request('POST'); } else { $client->setHeaders('Content-Type', 'application/atom +xml'); $client->setRawData($this->saveXML()); $response = $client->request('PUT'); } if ($response->getStatus() !== 200) { throw new Zend_Feed_Exception('Expected response code 200, got ' . $response->getStatus()); } } else { if ($postUri === null) { throw new Zend_Feed_Exception('PostURI must be specified to save new entries.'); } $client = Zend_Feed::getHttpClient(); $client->setUri($postUri); $client->setRawData($this->saveXML()); $response = $client->request('POST');

if ($response->getStatus() !== 201) { throw new Zend_Feed_Exception('Expected response code 201, got ' . $response->getStatus());

} }

// Update internal properties using $client->responseBody; @ini_set('track_errors', 1); $newEntry = @DOMDocument::loadXML($response->getBody()); @ini_restore('track_errors'); if (!$newEntry) { throw new Zend_Feed_Exception('XML cannot be parsed: ' . $php_errormsg); }

$newEntry =
$newEntry->getElementsByTagName($this->_rootElement)->item(0);

if (!$newEntry) { throw new Zend_Feed_Exception('No root <feed> element found in server response:' . "\n\n" . $client->responseBody);

}

if ($this->_element->parentNode) { $oldElement = $this->_element; $this->_element = $oldElement->ownerDocument->importNode($newEntry,
true);

$oldElement->parentNode->replaceChild($this->_element, $oldElement); } else { $this->_element = $newEntry; } }

/** * Easy access to <link> tags keyed by "rel" attributes. * * If $elt->link() is called with no arguments, we will attempt to * return the value of the <link> tag(s) like all other * method-syntax attribute access. If an argument is passed to * link(), however, then we will return the "href" value of the * first <link> tag that has a "rel" attribute matching $rel: * * $elt->link(): returns the value of the link tag. * $elt->link('self'): returns the href from the first <link rel="self"> in the entry. * * @param string $rel The "rel" attribute to look for. * @return mixed */ public function link($rel = null) { if ($rel === null) { return parent::__call('link', null); }

// index link tags by their "rel" attribute. $links = parent::__get('link'); if (!is_array($links)) { if ($links instanceof Zend_Feed_Element) { $links = array($links); } else { return $links; } }

foreach ($links as $link) { if (empty($link['rel'])) { continue; } if ($rel == $link['rel']) { return