Twitter is heavily becoming a source of traffic and with there extremely powerful api , it’s very easy to automate stuff via Twitter bots.

Today i am going to show you a tutorial for very simple but yet very powerful bot which if used effectively can drive great traffic on sites. These bots simply search twitter stream for predefined keywords and tweet target messages to the tweeters. These bots can be set via cron to read stream every few minutes and make responses in real time.

For newbies and starters all Twitter API documentation can be found here , From here we are going to use Search API methods and Status Update REST api method for sending predefined tweets to the users.

Search API can give output both in JSON and ATOM(XML) format , And can take several parameters for searching twitter stream. We are going to use just the query(q) parameter to provide keyword to the search ,A complete parameter list can be found here .

So , Let’s take the parameter query as PHP problem and send them our link of phpcollection.com in the tweet. For this we will first search the twitter stream for the keyword PHP problem

< ?php
$url = "http://search.twitter.com/search.atom?q=urlencode(PHP+problem)";

The response of this query is in a XML format so we will use simplexml PHP extension for converting this XML data in native PHP object. simplexml_load_file function loads and converts xml data directly from the url. It can be easily then traversed via a Php object.

$data = simplexml_load_file($url);

Now the data can be traversed via a foreach loop , $data->entry contains a array of all tweet entries. We will take them one by one in $value. Tweet username can be accessed via $value->author->uri to whom we will be tweeting the predefined message.

foreach ($data->entry as $value)
{
	$from_name = $value->author->uri;
	$from_name = str_replace ("http://twitter.com/", "", $from_name);
    	$message = "@$from_name Hey Buddy you can find solution to your problems at http://www.phpcollection.com #php";

Now we have the users who are looking for help in PHP language (via PHP problem keyword), Now using Twitter PHP wrapper we will tweet this message to the users. This can be easily achieved via CURL, However for the sake of the tutorial we will use mytwitter php class for tweeting back to users.

		require_once( 'mytwitter.php' );
		$twitter =  new MyTwitter('phpcollection', '**********');
 		$result = $twitter->updateStatus($message);
}
?>

Complete code can be downloaded here

Recently i needed to make a ringtone download website for a friend and we researched on web for a good affiliate with a decent API to make things easier for content download and integration on website.

We ended choosing OpenDada.com which is a affiliate website for dada.net , Dada.net is a premier provider for providing ringtones and other mobile content.

The API documentation for OpenDada can be found at API docs page .

There are four methods that are defined in the class, Namely they are:-

search_ringtone(“ARTIST NAME”);

top10();

display_single_ringtone(“ARTIST NAME”, “SONG TITLE”);

get_genre(“GENRE”);

All methods are explained in the example.php file and can be found  here.

Todo List:-

1) Add functionality to get more than 10 ringtones.
2) Put the class in phpclasses.org
3) Add option of inserting partner id

Will update the class with more functionality sooner.

Debugging PHP code is a  nightmare for all Php developers and these are the times when they miss the thread functionality like java in php, However some simple php debugging techniques can help y0u to code faster and thus save very valuable coding time.

These all debugging techniques are based on my experience and i would love to know what more techniques php programmers use for debugging there php code !, Please comment below and share with community if you know a secret weapon in php code debugging.

So , My 5 debugging tips are (in no particular order):-

1) Live PHP debugging:- Use a editor with inbuilt live Php debug (Like phped ,Phpdesigner, eclipse etc), Editors like editpad, notepad doesn’t support live debugging and thus need to run the php file on browser for finding the errors. These editors run php scripts via command line on every save and present any errors found.

Small human errors like missing a semicolon , not terminating the line correctly, missing brackets etc can be easily found using a live debug php editor.

2) Use Xdebug:-The Xdebug extension allows you to find  stack traces and function traces in error messages, memory allocation and protect from infinite recursions happening

It also provides profiling information for PHP code and is having the capability to debug scripts interactively with a debug client.

Xdebug can be found at xdebug.org (Editors like Phpdesigner and phpdebug already contain Xdebug inbuilt )

3) Activate Php error messages:- php.ini contains a lot of configuration options , Among those options there are a couple of options which control the way error messages are displayed to a user. Make sure that following two options are set as follows:-

display_errors = On

error_reporting = E_ALL & ~E_NOTICE

4) Use print and echo statements beforehand at critical points for debug:- This is somewhat a homegrown method that i use for php debugging which i found extremely helpful and useful in debugging big php codes.

While coding i create some virtual sections of code and in these virtual sections i put the echo statement to ensure that the code is passing through that portion correctly and echoing the data correctly that’s required.

But since i can’t left them always on , I put up a debug_check if statement to check whether the code is working in debug mode or production mode.

For example

< ?php

$debug_check = 1;

foreach ($array as $data) {

    if ($debug_check == 1)

        print ($data);

}

?>

Here the $debug_check variable is defined at the top of the web script. Once this is changed to 1, it displays all echo and print statements , This is when i am debugging the code.

When i am in production mode i simply change the value of $debug_check to 0 which again hide all echo and print statements,  This takes a little more time in coding initally , but proves to very helpful in long run.

5) Use Frameworks:- Frameworks are one of the most important change that is implemented in modern programming , Php frameworks like codeignitor and cakephp provides a lot of functionality for setting up test cases, units and debugging.

Also, Since most of the code is ran via libraries the error messages are nicely crafted and provides inbuilt details.

Two most favourite frameworks of mine are:- Cakephp and Codeignitor

Hope everyone enjoyed thsese 5 debugging techniques in PHP , I request everyone to share there piece of advise in php debugging , Will be compiling all of them in a a blog post with proper credits and publishing it !, It might proves useful to every php developer around the world.

PHP5 allows developers to create public , private and protected methods and properties. They can be defined as :-

Protected:- The specified class and subclasses of that class can use the methods of that class

protected class Test
{
 $dead = false;

 function human()
 {
 }

 function set($dead)
 {
  $this->dead = "true";
 }

}

Public:- The specified class can only use the methods of that class no subclasses can modify the contents of that class

public class Test
{
 $dead = false;

 function human()
 {
 }

 function set($dead)
 {
  $this->dead = "true";
 }

}

Private:- The specified class can use the methods of that class, No Subclasses can use any method of that classes !

private class Test
{
 $dead = false;

 function human()
 {
 }

 function set($dead)
 {
  $this->dead = "true";
 }

}

It’s a good idea to mark functions and classes as protected , This can future proof the code because no method can change the value outside from the class thus reducing the number of hacking attempts.

Wamp and XAMPP doesn’t come with default rewrite rule enabled, For enabling the rewrite rules in both of them you need to make changes in httpd.conf so that apache can work with rewrite rules.

For enabling the rewrite rules follow these rules:-

1) find httpd.conf (usually this file can be found in folder callled conf , config or something along those lines)

2) Find and uncomment the line LoadModule rewrite_module modules/mod_rewrite.so

3) Find the line with DocumentRoot “C:/path/to/my/root”, There you will find contents like

<Directory>

</Directory>

Make sure the content inside these two braces looks like

<Directory>

Options All

AllowOverride All

</Directory>

4) All done now restart the Apache server and you will be all good to go

Web 2.0 was all about mashups and data api’s !, Some of the popular ones are google search api , twitter api etc.

All API’s have some rate-limiting , For example Twitter API has a rate limit of 150 requests per hour ! , Yahoo API and Google API’s have a daily limit on their requests.

The ultimate method of getting over this API request limit is to make a cache method which stores all data that is coming from API , Which you can refresh hourly, weekly or daily !

That’s why i created a small function to store the API data in a xml cache file , Which can be later on retrieved to get data.Find that function below, Most of the functionality is explained in the comments , If anything is not clear contact me via contact page.

< ?php

function get_yahoo_data_cached($query, $zip) {
    // Rewrite by Julius Beckmann

    // Remove dangerous chars
    $query_safe = str_replace(array('.','/'), '_', $query);
    $zip_safe = str_replace(array('.','/'), '_', $zip);

    $cache_filename = "cache/$query_safe-$zip_safe.xml";
    $time_expire = time() + 24*60*60; // Expire Time (1 Day)

    // Check file change time
    if(filectime($filename) <= $time_expire) {
        // File is too old, refresh cache
        $xml = get_yahoo_data($query, $zip);
        // Remove cache file on error to avoid writing wrong xml
        if($xml)
            file_put_contents($cache_filename, $xml);
        else
            unlink($cache_filename);
    }else{
        // Fetch cache
        $xml = file_get_contents($cache_filename);
    }

    return $xml;
}

?>

Safe rewrite of the function by Julius Beckmann
This function creates a cache file for yahoo api requests , here we are using get_yahoo_data() function to fetch data from yahoo api which is a custom function for extracting data from yahoo api and throwing that in xml output format.

If we do a small synopsis of the above function we can see that it uses 2 variables to store cache , $filename stores the cache file and $file_log_name stores the last update time for that cache !

In my opinion one of the top most API’s used globaly on web portals is Google Search API, Google is famous for building world class API’s to harness the unique data Google collected with it’s excellent set of technology.

Google Labs is the ultimate playground of Google which he use for developing and testing there upcoming API’s , They have some exciting set of API’s currently in building. Which promise better web and can provide better value than Google Maps and Google Search API’s

Google O3D API:-

Virtual reality is the most discussed and researched technology few years back and it has proved it’s mark with the success of Second Life. O3D is natural extension to it and looks like it’s a extension to much hyped but failed technology VRML (Quotation needed)

Here’s a small example demo that is made using o3d Technology, Notice the amount of detail which goes in the demo video.

It’s Technical documentation can be found here , Also you can be a part of early developers league by joining this group o3D developers group

Google Wave API:-
Google Wave is another big collabration tool that Google is coming with, Aspired to be the next logical invention of Email . Google Wave innovates the collabration market with their wonderful approach of centric objects.  Google Wave can be accessed via Google wave APi which can be integrated with applications for collabrtation . Google presented a keynote which presented some cool features of Google Wave

Developers can check out some cool wave applications at Wave Sample gallery and check out the technical documentation here , Unfortunately Google wave currently have only Client libraries for Python and Java , We look forward to the Php library from Google soon.

Google Gears API:-

Google Gears and Adobe Air are two upcoming technologies that promise leveraging the power of desktop onto web , Google Gears API is a powerful tool for building web applications that can interact with the users desktops , Features like local caching, Storing user data locally and asynchronous threads are some powerful feature that can now be used on web apps.

Google Gears sample applications can be found here and Technical documentation can be found at this page

Google Analytics API:- The most common tool that webmasters use is the analytics tool for their website and Google analytics is the ultimate data churning tool for any website, If used properly Analytics can dig down to the deepest point of the content and traffic coming on web app or portal.

Several mertrics system like Mint , Quantcast etc exist today and provides extensive data, But the google analytics api can prove to be a milestone in extracting and tracking the traffic details that can effect your ROI.

Google analytics documentation can be located here

Google Coupons:- Two words that bring maximum ROI in any form of business are FREE and SALE .

Coupons are one of the most searched terms on the web, Providing ecommerce users good discount on items, What could be better than the coupons data from the leader in data collection itself !, The coupons API !

Coupons API provide easy import to coupons data which can be used by business users, This is pretty same as the legendy google base tool which allow webmasters and business people to upload information about their product listing.

Coupons uploaded through coupon API will be indexed on google and will be presented to all users on searching for that product or relevant keywords.

It’s documentation can be found at this site

Hope you guys liked this list of API’s , Will love to listen your comments and any another set of API’s i missed.

I bought a few domains lately and found these godaddy coupon code to buy the domains in 6.99 USD. Hope this helps some of our fellow developers.

6.99 .com Domain, Coupon Code:- goaz2001ai
6.99 .com Domain, Coupon Code:- goaztk03a

Usually programmers use a lot of JavaScript code snippets as functions regularly, These JavaScript functions are lengthy code snippets and are usually tough to understand and edit. Some of the most common functions used are form validation functions , Pagination functions etc.

The day since jQuery has been on the block , It has provided a nifty way of solving a lot of common problems for which we needed lengthy JavaScript functions. I am sharing with you guys top 20 jQuery plugins and code snippets that are pretty useful for daily coding routines.

1) Form validation plugin:- Form validation is probably the most common used JavaScript functionality used these days . However , a lot of repetitive editing is required in the forms and JavaScript regex expressions for correctly fitting the validations.

For this a nifty jquery plugin Valid8 provides a easy to use 4 line code to insert validation in any form !, Valid8 provides various methods including ajax requests, multiple regex validation etc in form validation , I have found ajax requests to be a nifty feature while checking username availability in registration and signup forms

Valid8 plugin page can be found at http://www.unwrongest.com/projects/valid8/

And it can be downloaded from:-

http://jquery-valid8.googlecode.com/files/jquery.valid8-1.2.2.js

2) Drag and Drop functionality using jQuery:- This excellent tutorial showed me a nifty way of making a drag and drop functionality , This drag and drop interface provide a excellent web 2.0 interface in your web projects for user usability. This drag and drop tutorial uses the Google JqueryUi plugin , Which we believe is used by google on it’s products  Drag and drop is used heavily by Google on it’s products such as gmail and igoogle.

For making such a drag and drop functionality you will need the jquery Ui plugin by google which can be located here.

The tutorial can be find at :- http://papermashup.com/drag-drop-with-php-jquery/

The demo of this tutorial can be located at http://papermashup.com/demos/jquery-drag-drop/

And the complete source code of the tutorial can be downloaded from http://papermashup.com/demos/jquery-drag-drop/jquery-drag-drop.zip

3) Pagination using jquery:- This is a official plugin from Jquery guys to provide pagination on any set of data you have. This plugin is a useful replacement of the php pagination classes and provides a neat web2.0 style pagination features.Pretty useful when we have a large sets of data such as search results or data listings.

Since this is a official plugin from jquery guys , The stability of the plugin is definitely unquestionable . it uses a simple javascript funciton which takes page_index and paging container as the arguments. For complete documentation read the official documentation of this plugin

The official Plugin page can be found at:- http://plugins.jquery.com/project/pagination

The demo of the plugin can be seen at:- http://d-scribe.de/webtools/jquery-pagination/demo/demo_options.htm

4) Embed flash using jQuery:- Flash is probably the best intreactive web technology invented till date, The people tend to understand best by audio-visual effects and flash is the ultimate choice on web.

Dealing with flash variables , cross-browser issues and browsers with flash plugin not installed always left a bitter experience for a programmer, But using this Embed flash plugin this issues can be sorted out in a easy manner.

The official plugin page can be found at:- http://jquery.lukelutman.com/plugins/flash/

5) Creating tag cloud via jQuery:- Tag cloud are a excellent way of showing important keywords and categories on your website ! , Usually tag cloud are made through php class via predefined keyword density.

The official plugin dynacloud shows a neat simple tagcloud which is generated dynamically.

The official plugin page can be found at:- http://plugins.jquery.com/project/dynacloud

Demo of the plugin can be found at

http://johannburkard.de/blog/programming/javascript/dynacloud-a-dynamic-javascript-tag-keyword-cloud-with-jquery.html

6) Insert Simple ajax effects using jquery :- Simple effects plugin provides easy methods of inserting cool ajax functionality and UI in your web apps.

UI functionality like Fade toggle boxes and blind toggle boxes are cool effect that can make your web apps UI a lovely experience for your users.

The official plugin page can be found at http://www.learningjquery.com/2008/02/simple-effects-plugins

7) Creating tips with jQuery  :- Tips are some efficient way of showing simple bits of information to users, This jquery plugin gives you a excellent way to create nifty tips in html code

Plugin page can be found at:- http://codylindley.com/Javascript/264/jtip-a-jquery-tool-tip

Demo of this jquery plugin :- http://www.codylindley.com/blogstuff/js/jtip/

These are some basic plugins that can make progrrammers life easy ! Try them and let us know how you find them !, Do list out your favorites plugin below.

Also, If you are beginning your steps on jquery development , Do try this excellent book on jquery . It has all necessary details on beginning jquery development