NP_LinkBack.php

Please note the development of this plugin has been discontinued. It is recommended you use NP_Referrer.

No documentation here. Please visit the forum.

<?
// script to create log of referrers to each article
// VERSION 0.32  For details please see README file included with distribution
// v0.32 by http://weblog.PlasticThinking.org
class NP_LinkBack extends NucleusPlugin {
 
   // name of plugin
   function getName() {
      return 'Link Back';
   }
 
   // author of plugin
   function getAuthor()  {
      return 'Mat Bennett';
   }
 
   // an URL to the plugin website
   // can also be of the form mailto:foo@bar.com
   function getURL()
   {
      return 'http://www.matbennett.com/';
   }
 
   // version of the plugin
   function getVersion() {
      return '0.31';
   }
 
   // a description to be shown on the installed plugins listing
   function getDescription() {
      return 'Creates links to the last referring pages. Call with &%LinkBack(5,last)%& to show the last 5 referrers.  (more options to follow)';
   }
 
   function doTemplateVar(&$item,$refs2list,$show)   {
      global $HTTP_REFERER;
      global $HTTP_HOST;
      global $itemid;
      $logtime = time();
      $new_ref = $HTTP_REFERER;
      //remove unwanted referrers (add own domain to this list) google, aol, askjeeves, hotbot, yahoo, aolsearch, alltheweb, altavista, excite, web can be used too
      $filterlist=array("topsearcher","overture");
      $parsed_ref=parse_url($new_ref);
      $ref_parts=explode("/", $new_ref);
      $ref_host=explode(".", $ref_parts[2]);
      // ignore referrer blockers
      if($ref_parts[0]!=="http:"){
         $new_ref="";
      }
      // ignore if referrer is this domain
      if ($ref_parts[2] == $HTTP_HOST) {
         $new_ref="";
      }
 
      // ignore filtered domains
      foreach($filterlist as $key => $key2)
      {
         if(in_array($key2, $ref_host)||in_array($key2, $ref_parts))
         {
            $new_ref="";
         }
      }
 
      // if we still have a referrer after all that, write it to the database
      if ($new_ref){
        // find the page title
        $fd = @fopen ($new_ref, "r");
        if ($fd){
           $ref_str = fread($fd, 200);
           if (eregi("<title>(.*)</title>", $ref_str, $out)) {
              $title = htmlspecialchars ($out[1],ENT_QUOTES);
           }
 
        }
        // set title to domain name if above does not find it
        if (!$title){
          $title = $ref_parts[2];
 
        }
         sql_query ("INSERT into nucleus_plug_lb_log (inum,ref_when,ref_url,ref_title) VALUES ('$itemid', '$logtime', '$new_ref','$title')");
         $check_dom = mysql_query("SELECT * FROM nucleus_plug_lb_top WHERE ref_domain = '$ref_parts[2]'");
         if (!$no_dom =  mysql_num_rows($check_dom)){
           sql_query ("INSERT into nucleus_plug_lb_top (ref_domain) VALUES ('$ref_parts[2]')");
         }
         sql_query ("UPDATE nucleus_plug_lb_top SET ref_total = ref_total + 1 WHERE ref_domain = '$ref_parts[2]'");
      }
 
      // start the output
      if (($refs2list > 0) AND ($show == 'last')){
         $query = mysql_query("SELECT ref_url, ref_title from nucleus_plug_lb_log WHERE inum = '$itemid' ORDER BY ref_when DESC LIMIT 0, $refs2list");
         if (mysql_num_rows($query)){
           echo '<h2>Die '.$refs2list.' aktuellsten Referrers</h2><div class="commentbody">';
         }
         while ($refs_array = mysql_fetch_array($query)){
          echo "<a href=\"".$refs_array["ref_url"]."\">".$refs_array["ref_title"]."</a><br>";
         }
 
if (mysql_num_rows($query)){
           echo '</div>';
         }
 
      }
 
 
 
 
   }
 
 function install(){
    // create required table
    sql_query ("CREATE TABLE `nucleus_plug_lb_log` ( `inum` INT(11) NOT NULL, `ref_when` INT(10) NOT NULL, `ref_url` VARCHAR(160) NOT NULL, `ref_title` VARCHAR(80) NOT NULL )");
    sql_query ("CREATE TABLE `nucleus_plug_lb_top` ( `ref_domain` VARCHAR(60) NOT NULL, `ref_total` INT(10) DEFAULT '0' NOT NULL, PRIMARY KEY (`ref_domain`) )");
 }
 
 function uninstall(){
   // delete created tables on uninstall
   sql_query ("DROP TABLE `nucleus_plug_lb_log`");
   sql_query ("DROP TABLE `nucleus_plug_lb_top`");
 }
 function getTableList() {
   return array('nucleus_plug_lb_log', 'nucleus_plug_lb_top');
 }
 
}
?>

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