http://www.feedblitz.comDescription: Adds a checkbox to the user registration dialog enabling users to register for both a WordPress site and create a FeedBlitz newsletter subscription from a single screen Version: 0.91Author: FeedBlitz, LLCAuthor URI: http://www.feedblitz.com/*/
/** * WP PLUGIN CONFIGURATION **/
$fbz_data = array( 'feedblitz_feedid' => '', 'feedblitz_text' => 'Keep me up to date via email');
add_option('feedblitz_settings',$fbz_data,'FeedBlitz Newsletter Options');
$feedblitz_settings = get_option('feedblitz_settings');
function fbz_is_hash_valid($form_hash) { $ret = false; $saved_hash = fbz_retrieve_hash(); if ($form_hash === $saved_hash) { $ret = true; } return $ret;}
function fbz_generate_hash() { return md5(uniqid(rand(), TRUE));}
function fbz_store_hash($generated_hash) { return update_option('feedblitz_token',$generated_hash,'FeedBlitz Security Hash');}
function fbz_retrieve_hash() { $ret = get_option('feedblitz_token'); return $ret;}
/* Heavily borrowed auth code from the FeedBurner FeedSmith plugin */function fbz_ol_is_authorized() { global $user_level; if (function_exists("current_user_can")) { return current_user_can('activate_plugins'); } else { return $user_level > 5; }}
function fbz_ol_add_feedblitz_options_page() { if (function_exists('add_options_page')) { add_options_page('FeedBlitz', 'FeedBlitz', 8, basename(__FILE__), 'fbz_ol_feedblitz_options_subpanel'); }}
function fbz_ol_feedblitz_options_subpanel() { global $fbz_ol_flash, $feedblitz_settings, $_POST, $wp_rewrite; if (fbz_ol_is_authorized()) { // Easiest test to see if we have been submitted to if(isset($_POST['feedblitz_feedid']) isset($_POST['feedblitz_text'])) { // Now we check the hash, to make sure we are not getting CSRF if(fbz_is_hash_valid($_POST['token'])) { if (isset($_POST['feedblitz_feedid'])) { $feedblitz_settings['feedblitz_feedid'] = $_POST['feedblitz_feedid']; update_option('feedblitz_settings',$feedblitz_settings); $fbz_ol_flash = "Your settings have been saved."; } if (isset($_POST['feedblitz_text'])) { $feedblitz_settings['feedblitz_text'] = $_POST['feedblitz_text']; update_option('feedblitz_settings',$feedblitz_settings); $fbz_ol_flash = "Your settings have been saved."; } } else { // Invalid form hash, possible CSRF attempt $fbz_ol_flash = "Security hash missing."; } // endif fb_is_hash_valid } // endif isset(feedblitz_xxx) } else { $fbz_ol_flash = "You don't have enough access rights."; } if ($fbz_ol_flash != '') echo '

' . $fbz_ol_flash . '

'; if (fbz_ol_is_authorized()) { $temp_hash = fbz_generate_hash(); fbz_store_hash($temp_hash); echo '

'; echo '

FeedBlitz Newsletter Settings

'; echo '

This plugin makes it easy keep visitors up to date with your FeedBlitz newsletter by integrating newsletter sign up with the end user registration process.

1. To get started, create a FeedBlitz Newsletter for ' . get_bloginfo('name') . ' if you have not done so already.
2. Once you have created your Newsletter, enter its ID into the field below (the Newsletter ID can be found at http://www.blogger.com/%3Ca%20class=):http://www.feedblitz.com/f/f.fbz?Lists">http://www.feedblitz.com/f/f.fbz?Lists):
   type="text" name="feedblitz_feedid" value="' type=text name=feedblitz_text div>?; }
   }
   /** * WP HOOKS **/add_action('register_post','plugin_post',10,3);add_action('register_form','plugin_form');
   /** * END WP HOOKS **/
   /* Because I'm no PHP expert, copied from example at http://nadeausoftware.com/articles/2007/06/php_tip_how_get_web_page_using_curl */function fbz_get_web_page( $url ){ $options = array( CURLOPT_RETURNTRANSFER => true, // return web page CURLOPT_HEADER => false, // don't return headers CURLOPT_FOLLOWLOCATION => true, // follow redirects CURLOPT_ENCODING => "", // handle all encodings CURLOPT_USERAGENT => "spider", // who am i CURLOPT_AUTOREFERER => true, // set referer on redirect CURLOPT_CONNECTTIMEOUT => 120, // timeout on connect CURLOPT_TIMEOUT => 120, // timeout on response CURLOPT_MAXREDIRS => 10, // stop after 10 redirects ); $ch = curl_init( $url ); curl_setopt_array( $ch, $options ); $content = curl_exec( $ch ); $err = curl_errno( $ch ); $errmsg = curl_error( $ch ); $header = curl_getinfo( $ch ); curl_close( $ch ); $header['errno'] = $err; $header['errmsg'] = $errmsg; $header['content'] = $content; return $header;}
   /* Process the checkbox added and call FeedBlitz to start the dual opt in newsletter process */function plugin_post($login,$email,$errors){
   global $feedblitz_settings;
   /* ask feedblitz to send the registrant an activation email to confirm their subscirption (dual opt in). When the user clicks the link they will have to complete a captcha to prove they're human */
   $feedid=$feedblitz_settings['feedblitz_feedid'];
   if(trim($feedid)=='') { $errors->add('newsletter_error',__('Newsletter ID not specified. Please log in to the admin user interface and update the FeedBlitz settings')); }
   if($_POST['fbz_checkbox']==__('on')) { $page='http://www.feedblitz.com/f?newsubscriber='.$email.'&feedid='.$feedblitz_settings['feedblitz_feedid']; fbz_get_web_page($page);
   if ( $result['errno'] != 0 $result['http_code'] != 200 ) { /* commented out because not getting a newsletter isn't fatal - let registration continue*/ /* $errors->add('newsletter error',__'Unable to initiate newsletter subscription')); */ } }}
   /* Add the subscription checkbox to the screen */function plugin_form(){ global $feedblitz_settings; $feedid=$feedblitz_settings['feedblitz_feedid']; if(trim($feedid)!='') { $html = '

   '.$feedblitz_settings['feedblitz_text'].'

   '; } else { $html='

   FeedBlitz plugin error. No feed id specified. Integrated newsletter registration is disabled.

   '; }echo $html;}
   add_action('admin_menu', 'fbz_ol_add_feedblitz_options_page');
   ?>