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¿Por que Google no cache mi foro?

Es una pregunta que se hace mucho la gente,y una de las razones que hay de por que google no cache los foros de phpbb,tiene que ver con los SID de usuario que phpbb asigna a cada visita.Google como otros Buscadores no le sienta bien ese SID,ASi que lo mejor que se puede hacer es quitar el SID cuando sea google quien visita nuestro foro,La tarea de como hacerlo es sencilla,veamoslo a continuacion:

Código: Seleccionar todo


##############################################################
## MOD Title: enhance-google-indexing
## MOD Author: Showscout & R. U. Serious
## MOD Description: If the User_agent includes the string 'Googlebot', then no session_ids are appended to links, which will (hopefully) allow google to index more than just your index-site.
## MOD Version: 0.9.1
##
## Installation Level: easy
## Installation Time: 2 Minutes
## Files To Edit: includes/sessions.php
## Included Files: n/a
##############################################################
## Author Notes: There may be issues with register globals on newer
##       PHP version. If you know for sure and also how to fix it post in
##       this thread: http://www.phpbb.com/phpBB/viewtopic.php?t=32328
##
##       Obviously, if someone thinks it's funny to surf around with a
##       user_agent containing Googlebot and at the same time does not
##       allow cookies, he will loose his session/login on every pageview.
##       Should he complain to you, tell him to eat your shorts.
##
##       If you want to add further crawlers look at the appropiate line and
##       feel free to add part of the user_agent which should be _unique_
##       unique to that, so a user is never confused with a bot.
##
##############################################################
## Version History: 0.9.0 initial release, only googlebot
##                         0.9.1 added inktomi (MSN-search/crawler-bot)
##############################################################
## Before Adding This MOD To Your Forum, You Should Back Up All Files Related To This MOD
##############################################################

#-----[ OPEN  ]------------------------------------------
includes/sessions.php

#-----[ FIND ]------------------------------------------
   global $SID;

   if ( !empty($SID) && !preg_match('#sid=#', $url) )

#-----[ REPLACE WITH ]------------------------------------------
   global $SID, $HTTP_SERVER_VARS;

   if ( !empty($SID) && !preg_match('#sid=#', $url) && !strstr($HTTP_SERVER_VARS['HTTP_USER_AGENT'] ,'Googlebot') && !strstr($HTTP_SERVER_VARS['HTTP_USER_AGENT'] ,'slurp@inktomi.com;'))

#
#-----[ SAVE/CLOSE ALL FILES ]------------------------------------------
#
# EoM

Y si ademas quieres que Google solo tenga una una sesion en el foro en lugar de muchas como suele pasar,implementa este codigo:

Código: Seleccionar todo

################################################################
## MOD Title: GoogleSingleSession (Add-On to enhance-google-indexing )
## MOD Author: - R. U. Serious
## MOD Description: This MOD will give all 'guests' where the useragent
##          contains 'Googlebot' one session (static session_id)
##          Hence it will only appear as a single guest.
##
## MOD Version: 0.9
##
## Installation Level: (easy)
## Installation Time: 5 Minutes
## Files To Edit: includes/sessions.php 
##############################################################

#-----[ OPEN ]------------------------------------------
#
includes/sessions.php

#
#-----[ FIND ]------------------------------------------
#
$session_id = md5(uniqid($user_ip));

#
#-----[ REPLACE WITH ]------------------------------------------
#
# Note: d8ef2eab is one of the googlecrawlbots ips
#
//$session_id = md5(uniqid($user_ip));
global $HTTP_SERVER_VARS;
$session_id = ( !strstr($HTTP_SERVER_VARS['HTTP_USER_AGENT'] ,'Googlebot') ) ? md5(uniqid($user_ip)) : md5(d8ef2eab);


#
#-----[ FIND ]------------------------------------------
#
   else
   {
      $sessiondata = '';
      $session_id = ( isset($HTTP_GET_VARS['sid']) ) ? $HTTP_GET_VARS['sid'] : '';
      $sessionmethod = SESSION_METHOD_GET;
   }


#
#-----[ AFTER ADD ]------------------------------------------
#
   global $HTTP_SERVER_VARS;
   if ( empty($session_id)  && strstr($HTTP_SERVER_VARS['HTTP_USER_AGENT'] ,'Googlebot') )
   {
      $sessiondata = '';
      $session_id = md5(d8ef2eab);
      $sessionmethod = SESSION_METHOD_GET;
   }


#
#-----[ FIND ]------------------------------------------
#

         if ($ip_check_s == $ip_check_u)

#
#-----[ REPLACE WITH ]------------------------------------------
#

   //      if ( $ip_check_s == $ip_check_u )
         if (($ip_check_s == $ip_check_u) || ($session_id == md5(d8ef2eab)&&(strstr($HTTP_SERVER_VARS['HTTP_USER_AGENT'] ,'Googlebot'))))

#
#-----[ SAVE/CLOSE ALL FILES ]------------------------------------------
#
# EoM

Articulo de la phpBB :: Knowledge base. Escrito en el 2002 y revisado para actualizar el codigo