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Library to prevent loading user_agent on every page - Printable Version

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+--- Thread: Library to prevent loading user_agent on every page (/showthread.php?tid=64212)

Library to prevent loading user_agent on every page - moshair - 01-27-2016

Hello,

I use user_agent to show a specific style for mobile device, also I don't want showing content for search engines, I don't want loading the user_agent every time the page load to reduce memory and CPU usage; So I wrote this library:

Common.php
Code:
<?php
class Common {
 private $CI;
 function mobile() {
   $CI = & get_instance();
   if ($CI->session->userdata('mobile')) {
     $mobile = $CI->session->userdata('mobile');
     //echo 'mobile check loaded from cookie';
   }
   else {
     $CI->load->library('user_agent');
     if ($CI->agent->is_mobile()) {
       $mobile = 'y';
     }
     else {
       $mobile = 'n';
     }
     $CI->session->set_userdata('mobile', $mobile);
     //echo 'mobile check loaded from user_agent';
   }
   return $mobile;
 }


 function bot() {
   $CI = & get_instance();
   if ($CI->session->userdata('bot')) {
     $bot = $CI->session->userdata('bot');
   }
   else {
     $CI->load->library('user_agent');
     if ($CI->agent->is_robot()) {
       $bot = 'y';
     }
     else {
       $bot = 'n';
     }
     $CI->session->set_userdata('bot', $bot);
   }
   return $bot;
 }
}

In the controller I have for testing:

Code:
<?php
if (!defined('BASEPATH'))
 exit ('No direct script access allowed');
class Test extends CI_Controller {
 function __construct() {
   parent :: __construct();
 }
 public function index() {
   $this->load->library('common');
   echo '<br><br> Mobile: ' . $this->common->mobile();
   echo '<br> Bot: ' . $this->common->bot();
 }
}

It is working on mobile browser, but any body know if it will work with search engine bots !!!!

Regards,