Heya guys, I just built this small tool so you can add into your sites to compress your content and and modify it to save bandwidth.
How it works:
This class will watch your script so when your echoing content it will do some modifications and can also take your own modifications aswell
The Class:
Usage:
If you already have the function ob_start() in your script then replace with the code below, otherwise add the code below before your session_start() or at the very start of your script.
This will now compress your source before it gets to the user.
Adding Callbacks:
You can add your own custom callbacks to modify the end content such as rudes whitespace, add timestamps etc etc.
Example of callback:
As you can see the above is a function that returns the in-putted string but adds a html comment to the end with the time-stamp within it.
You can add it to your Output Controller like so:
the params for the addCallback method are
You can also add methods from objects by passing an array of the object adn the method
Example:
heres another example that you can use to compress whitespace in your html source.
and then you can just keep this in a seperate file and include it and then add the callback like so
this will change the following code:
Into:
Now all your html will be compress like Litewarez and Katz.
P.S, The above function was taken from a smarty plugin and slightly modified
How it works:
This class will watch your script so when your echoing content it will do some modifications and can also take your own modifications aswell
The Class:
PHP:
<?php
class OutputBuffer
{
private $callbacks = array(); //Holder for callbacks
private $content;
function __construct()
{
ob_start(array($this,'handler'));
}
function addCallback($name,$item)
{
if(is_callable($item))
{
$this->callbacks[$name] = $item;
return true;
}
return false;
}
function handler($contents,$bitAtchion = null)
{
if($bitAtchion & PHP_OUTPUT_HANDLER_START)
{
$this->content = ''; //A New Buffer
}
if($bitAtchion & PHP_OUTPUT_HANDLER_CONT)
{
$this->content .= $contents;
}
if($bitAtchion & PHP_OUTPUT_HANDLER_END)
{
$this->content .= $contents;
//AS this is a final request we want to run the callbacks
foreach($this->callbacks as $this->callback)
{
try
{
$this->content = call_user_func($this->callback,$this->content);
} catch(Exception $e){}
}
return $this->_compress($this->content); //Compress and push out
}
return $this->content;
}
function _compress($string)
{
if(headers_sent() || function_exists('gzencode') === false)
{
return $string; //Cant compress
}
$ctype = strpos($_SERVER["HTTP_ACCEPT_ENCODING"], 'x-gzip') ? 'x-gzip' : strpos($_SERVER["HTTP_ACCEPT_ENCODING"], 'gzip') ? 'gzip' : false;
if($ctype !== false)
{
header('Content-Encoding: '.$ctype);
return gzencode($string);
}
return $string;
}
}
?>Usage:
If you already have the function ob_start() in your script then replace with the code below, otherwise add the code below before your session_start() or at the very start of your script.
PHP:
include 'OutputBuffer.php';
$buffer = new OutputBuffer();This will now compress your source before it gets to the user.
Adding Callbacks:
You can add your own custom callbacks to modify the end content such as rudes whitespace, add timestamps etc etc.
Example of callback:
PHP:
function addTimeStamp($content)
{
return $content . '<!--' . time() . '-->';
}As you can see the above is a function that returns the in-putted string but adds a html comment to the end with the time-stamp within it.
You can add it to your Output Controller like so:
PHP:
$buffer->addCallback('timestamp','addTimeStamp');the params for the addCallback method are
Code:
addCallback( string $name[, mixed $callback]])You can also add methods from objects by passing an array of the object adn the method
Example:
PHP:
$buffer->addCallback('tidyHtml',array($object,'method'));heres another example that you can use to compress whitespace in your html source.
PHP:
function _trimwhitespace($source)
{
// Pull out the script blocks
preg_match_all("!<script[^>]*?>.*?</script>!is", $source, $match);
$_script_blocks = $match[0];
$source = preg_replace("!<script[^>]*?>.*?</script>!is",'@@@FILTER_TRIM_SCRIPT@@@', $source);
// Pull out the pre blocks
preg_match_all("!<pre[^>]*?>.*?</pre>!is", $source, $match);
$_pre_blocks = $match[0];
$source = preg_replace("!<pre[^>]*?>.*?</pre>!is",'@@@FILTER_TRIM_PRE@@@', $source);
// Pull out the textarea blocks
preg_match_all("!<textarea[^>]*?>.*?</textarea>!is", $source, $match);
$_textarea_blocks = $match[0];
$source = preg_replace("!<textarea[^>]*?>.*?</textarea>!is",'@@@FILTER_TRIM_TEXTAREA@@@', $source);
// remove all leading spaces, tabs and carriage returns NOT
// preceeded by a php close tag.
$source = trim(preg_replace('/((?<!\?>)\n)[\s]+/m', '\1', $source));
// replace textarea blocks
_outputfilter_trimwhitespace_replace("@@@FILTER_TRIM_TEXTAREA@@@",$_textarea_blocks, $source);
// replace pre blocks
_outputfilter_trimwhitespace_replace("@@@FILTER_TRIM_PRE@@@",$_pre_blocks, $source);
// replace script blocks
_outputfilter_trimwhitespace_replace("@@@FILTER_TRIM_SCRIPT@@@",$_script_blocks, $source);
return $source;
}
//HELPER FUNCTION, NEEDED ABOVE.
function _outputfilter_trimwhitespace_replace($search_str, $replace, &$subject)
{
$_len = strlen($search_str);
$_pos = 0;
for ($_i=0, $_count=count($replace); $_i<$_count; $_i++)
if (($_pos=strpos($subject, $search_str, $_pos))!==false)
$subject = substr_replace($subject, $replace[$_i], $_pos, $_len);
else
break;
}and then you can just keep this in a seperate file and include it and then add the callback like so
PHP:
$buffer->addCallback('trim_white_space','_trimwhitespace');this will change the following code:
Code:
<html>
<head>
<title>my Website</title>
</head>
<body>
<p>.....</p>
</body>
</html>Into:
Code:
<html><head><title>my Website</title></head><body><p>.....</p></body></html>P.S, The above function was taken from a smarty plugin and slightly modified
