Active GZIP and compress via Hooks

Author: Emmanuel Campait

application/config/config.php

@@ -94,7 +94,7 @@
 | setting this variable to TRUE (boolean).  See the user guide for details.
 |
 */
-$config['enable_hooks'] = FALSE;
+$config['enable_hooks'] = TRUE;
 
 /*
 |--------------------------------------------------------------------------
@@ -456,7 +456,7 @@
 | by the output class.  Do not 'echo' any values with compression enabled.
 |
 */
-$config['compress_output'] = FALSE;
+$config['compress_output'] = TRUE;
 
 /*
 |--------------------------------------------------------------------------

application/config/hooks.php

@@ -11,3 +11,11 @@
 |	http://codeigniter.com/user_guide/general/hooks.html
 |
 */
+
+/* http://php.quicoto.com/how-to-speed-up-codeigniter/ */
+$hook['display_override'] = array(
+    'class' => '',
+    'function' => 'compress',
+    'filename' => 'compress.php',
+    'filepath' => 'hooks'
+);

application/hooks/compress.php

@@ -0,0 +1,26 @@
+<?php
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+$CI     =& get_instance();
+$buffer = $CI->output->get_output();
+
+$search = array(
+    '/\>[^\S ]+/s',
+    '/[^\S ]+\</s',
+    '/(\s)+/s',
+    '#(?://)?<!\[CDATA\[(.*?)(?://)?\]\]>#s',
+    '/\>(\s)+\</'
+);
+
+$replace = array(
+    '>',
+    '<',
+    '\\1',
+    "//&lt;![CDATA[\n".'\1'."\n//]]>",
+    '><'
+);
+
+$buffer = preg_replace($search, $replace, $buffer);
+
+$CI->output->set_output($buffer);
+$CI->output->_display();