No I am not insane, and after a long days search over the wide Internet, even google admitted defeat, there seemed to be no way to do this. Finally I had already dropped the idea or even let off the thing altogether. But recently for another project I needed to check in for an entirely different requirement and stumbled on the fact. And yes I checked it, voila the shell invoke from mysql trigger is possible.
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We were worried, about all the comments on kerala online, being marked as spam by the akismet plugin. When on detailed examination, we found that the basic problem was that wordpress was logging only the immediate downsteam ip as the remote address, well ours was a bit confusing setup, but to handle the traffic we needed it that way.
A search for wordpress behind reverse proxy, landed me to the wordpress support page. In fact the 5th entry on that page is done by Gopka, who is the lead on this project from Saturn.
We started to correct the remote address by overriding the global variable making slight changes to the wp-config, such that we will not accidentally overwrite the changes while upgrading wordpress. Well the code
if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
$list = explode(',',$_SERVER['HTTP_X_FORWARDED_FOR']);
$_SERVER['REMOTE_ADDR'] = $list[0];
}
when added to the wp-config, it started to log the first IP, and that would be mostly private IPs if the request was from organisations where internet was shared through proxies or using NAT. The case was same at our office, so we had to find the first public ip from the list of IPs and the code for function getIpBehindProxy was the out come.
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During the past couple of months, since we are maintaining a heavily loaded wordpress implementation, Kerala News Portal for Asianet, distributed across two servers, and having a daily visit of 50K, I was on the hunt for better caching and optimizing techniques. On the move, I happened to read the article by Jeff Starr, written some 15 months ago, and all the associated comments. It was sad to see that the file based cache was removed from wordpress, due to several reasons though.
After reading through this, I saw the official Function Reference for WP Cache, and the eAccelerator for WordPress by NeoSmart Technologies. Reading through the code written by Computer Guru of NeoSmart Technologies, tickled me and I just modified some parts, by pulling out the eaccelerator specific functions, and switching to a file system based store. I am not adding the code as pretty php code. Drop the file into wp-content, create a cache folder in wp-content and chmod folder to 755.
File based object caching for Wordpress (465)
Purely on academic basis, I had once helped to cook up a web spider, which is used to build site maps. The spider was written in php and uses a couple of reg-exp matches, and finally writes the full sitemap from the start url. The system is assembled using two classes, WebPage and WebSpider. Then to make it similar to linux utilities in the command line environment, some functions were scooped in.
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After reading about Website Performance Tweaks, and a lot of other blogs and slides, I thought about how to cook up a javascript aggregate plugin for wordpress. The out come is wp-jsmin. Though this is in its infancy, it is being used in this blog, to combine all linked javascript to a single link, thereby reducing server requests. This code is still in the testing stage, and may break if the used scripts do not pass lint checks. I am planning to shift all the options to a options page in the wordpress admin page.
Those who are daring enough could download and try. Please put a comment here if you are using this on your wordpress. And for others who would like professional help, I would be most pleased to extend my services through RentACoder. Or for a whole dedicated wordpress team to design, build and maintain sites like Kerala News, Cirrus Travles or Rajeev Gandhi Center for Biotechnology, send an inquiry to Saturn.
WP-JsMin (296)We always try to store images in a web path where heavy image linking is needed, and mostly the images will be categorised in some sort of directory tree.. to limit the no of files in a folder.
Once editing, for example, re assinging a set of students from one scientist to another, was needed, and the hell, we had to face.. finally the following piece of code was written, for a future reuse.
<?php
function mkdir_r($dirName, $rights=0777){
$dirs = explode('/', $dirName);
$dir='';
foreach ($dirs as $part) {
$dir.=$part.'/';
if (!is_dir($dir) && strlen($dir)>0)
mkdir($dir, $rights);
}
}
function xMove($source, $target, $drop = true){
if(!is_dir($source)) return false;
if(!is_dir($target)) mkdir_r($target);
$d = dir($source);
while (false !== ($entry = $d->read())) {
if(!is_dir($source. "/$entry")){
copy($source . "/$entry", $target . "/$entry");
unlink($source . "/$entry");
}
}
$d->close();
if($drop)
rmdir($source);
}
?>
If any body is wondering (just a thought) how I have managed the colour highlighting, then better take a look at Phpizer Plugin
To quote the zapatec site ” The Zapatec DHTML Tree is an easy, attractive, and versatile way to display information. You can use the DHTML tree as a menu, a site map, or a way to display your data. Our DHTML Tree works in many different browsers, but if visitors use older browsers, they will still be able to see and use the underlying HTML code. ”
I did find this very good, and in the sense that it provides a method for the Search Engines to see all the links. Recently in an administrative backend, I needed to provide a method to browse multilevel deep category subcategory, where they add new products, to their existing line, for which I did choose the lite version of zapatec suite.
The generation of nested ul/li tags for the tree was a real pain for me, from the existing database. And I thought about a wrapper which could do the job if provided with an array of data rows. Hence I made the class-tree.php. The included file is having an implementation sample which will need the lite version from zapatec site.
The sample implementation with the help of zapatec could generate a tree as shown from the code attached below.
from
To start with the implementation, we create an instance of the zptree after including the class-tree.php, and passing the path of zapatec js files.
Then initiate the tree data using $catTree->treeData = array(); Then go along selecting the data from mysql using the select statement select category_id as id,category_name,parent_category_id from category order by parent_category_id, inside a while loop, the tree data is added to the member array, while($rd = $db->fetch_array($rs)) $catTree->treeData[] = $rd;
The attached class-tree.php also has an example implementation at the end, which should be removed before using in production.
Please excuse me about the sloppy documentation, since I am no good at explaining things.
The code: Source File in text
I usually use this to check the generation time for any page. There are critical applications which we are developing and will need less than a milli second generation time.
Howdy,
This comes useful when you think about getting content from other sites like RSS Feeds, text feeds, currency conversion rates etc. I tried to make this several times without such an enhancement. Finally the need arose and I have made this a reality.
I will need to find a better code highlighter plugin for wordpress before I can post many php codes and classes. Meanwhile this is being trying for a change:
In a recent web project of mine, it was needed to offload some mp3 files to another server as per the hosting providers specifications. 
these could not be overidden since the service was free for a specific purpose. The database was on a different server, and as most of you know, this does not affect php a bit.
But the media bifurcation did take me for a spell. On my test bed, I was using readfile() to read the contents of the mp3file to the browser, after providing correct header tags. In the test server this was working fine, since the file urls were relative ofcourse. I checked through the hosting system using phpinfo() and did confirm the url_fopen wrappers were enabled. But to my dismay, when loaded on to the hosting space, it seemed that the readfile was failing and hence I needed a different method.
Then like a thunderbolt this idea of a file proxy class came to my mind. And this was implemented. It works for me and my project. There may be different view points, as well as enhancements. I would appreciate it if some one could enhance it in case the url_fopen wrappers is disabled in the php configuration.
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