CodeIgniter - Page Caching

CodeIgniter - Page Caching

 Caching  a  page  will  improve  the  page  load  speed.  If  the  page  is  cached,  then  it  will  be stored  in  its  fully  rendered  state.  Next  time,  when  the  server  gets  a  request  for  the cached page, it will be directly sent to the requested browser.
Cached  files  are  stored  in  application/cache  folder.  Caching  can  be  enabled  on    per page  basis.  While  enabling  the  cache,  we  need  to  set  the  time,  until  which  it  needs  to remain in cached folder and after that period, it will be deleted automatically.
Enable Caching
Caching can be enabled by executing the following line in any of the controller’s method.
$this->output->cache($n);
Where  $n  is  the  number  of  minutes,  you  wish  the  page  to  remain  cached  between refreshes.
Disable Caching

Cache  file  gets  deleted  when  it  expires  but  when  you  want  to  delete  it  manually,  then you have to disable it. You can disable the caching by executing the following line.
//  Deletes  cache  for  the  currently  requested  URI
$this->output->delete_cache();
//  Deletes  cache  for  /foo/bar

$this->output->delete_cache('/foo/bar');
Example

Create  a  controller  called  Cache_controller.php and save it in application/controller/Cache_controller.php
<?php
class  Cache_controller  extends  CI_Controller  {
public  function  index()
{
$this->output->cache(1);
$this->load->view('test');

}
public  function  delete_file_cache()
{
$this->output->delete_cache('cachecontroller');
}
}

?>
Create a view file called test.php and save it   in application/views/test.php
<!DOCTYPE  html>
<html  lang="en">
<head>
<meta  charset="utf-8">
<title>CodeIgniter  View  Example</title>
</head>
<body>
CodeIgniter  View  Example
</body>

</html>
Change  the  routes.php  file  in  application/config/routes.php  to  add  route  for  the above controller and add the following line at the end of the file.
$route['cachecontroller']  =  'Cache_controller';

$route['cachecontroller/delete']  =  'Cache_controller/delete_file_cache';
Type the following URL in the browser to execute the example.
After  visiting  the  above  URL,  you  will  see  that  a  cache  file  for  this  will  be  created  in

application/cache folder. To delete the file, visit the following URL.
http://yoursite.com/index.php/cachecontroller/delete













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