There is a blue patch at the end of this post that mentions the “Last Updated On” date. It is the date when this particular post of last modified or updated on. Since I keep updating many of the old posts from time to time, thought it would be a nice idea to display the… Read More »
In a previous example we learnt about the . In this example we shall build a basic ECHO client and server. The server/client shown here use TCP sockets or SOCK_STREAM. Tcp sockets are connection oriented, means that they have a concept of independent connection on a certain port which one application can use at a… Read More »
Here is a list of most popular puzzle games on Ubuntu Linux Marble Arena 2 Excellent graphics and colorful. This is a game where a marble is to be moved around and points to be collected. Project website http://www.marble-arena.com/ Install on ubuntu 1. Download Linux version from http://www.marble-arena.com/ 2. Install libwebkit1.1-cil from synaptic 3. Extract… Read More »
Socket programming in Java This is a quick guide/tutorial to learning socket programming in Java. The Socket class is documented at http://docs.oracle.com/javase/1.4.2/docs/api/java/net/Socket.html To summarise the basics, sockets are the fundamental “things” behind any kind of network communications done by your computer. For example when you type www.google.com in your web browser, it opens a socket… Read More »
Tutorial on how to code simple network servers and clients using low level Socket api in python.
There are a lot of IDEs for ubuntu for doing php related web development. Lets see a few. Aptana Studio Supports PHP, Ruby, Python and more. Autosuggest dropdowns available, Integrated preview available. Project website http://www.aptana.com/ Install on ubuntu Download from http://www.aptana.com/ Quanta Quanta is the Dreamweaver of Linux. However it is not developed anymore. As… Read More »
Php and tcp/ip sockets This is a quick guide to learning socket programming in php. Socket programming php is very similar to C. Most functions are similar in names, parameters and output. However unlike C, socket programs written in php would run the same way on any os that has php installed. So the code… Read More »
What are callbacks Callback is a piece of code that is passed to some other functions as a parameter, such that it can be executed before or after a certain event or change of state. A common example of callbacks can be seen in javascript when using the jquery ajax function. $.ajax({ url: 'ajax/test.html', success:… Read More »
The idea behind serializing a variable is to create a storable string format of it, such that the same variable can be recreated later when required using the string. 1. serialize and unserialize These are the traditional functions to serialize and unserialize data in PHP. $a = array('a' => 'Apple' ,'b' => 'banana' , 'c'… Read More »
Github Login Github has become a very popular social login on websites related to programming and development. Github itself is a big storehouse of opensource projects and community of developers. Github oAuth documentation can be found at http://developer.github.com/v3/oauth/. Register website with Github oAuth The first thing to do would be to register your website with… Read More »
Yahoo OpenId In the previous article, we learned how to integrate . Its good to know that Yahoo is also an openid provider and “Login with Yahoo” can be added to a website in a very similar manner. Yahoo’s openid discovery url is http://me.yahoo.com/. The rest of the code is very simple. Code <?php /*… Read More »
OpenId A very popular login method now a days is to allow users to login through their google, openid etc accounts. One popular protocol being used is the OpenId. According to wikipedia : OpenID is an open standard that describes how users can be authenticated in a decentralized manner, eliminating the need for services to… Read More »
How to setup a jailed shell on Ubuntu using jailkit.
Quick guide on how to compile and install jailkit on Ubuntu/Debian based linux systems.
Clientside certificates are often used in soap webservices. For example the wsdl file link might require a clientside certificate. The server throws an error like this : HTTP Error 403.7 – Forbidden: SSL client certificate is required. Curl Command To use clientside certificate with curl , test the following command curl –cert certificate_file.pem https://www.example.com/some_protected_page or… Read More »
Bsnl has plenty of high speed (4 MPBS) plans as mentioned here : http://bsnl.co.in/opencms/bsnl/BSNL/services/broadband/new_BB_postpaid.html . These are on the NIB – II Network. Ip addresses begin with 117. One known problem with the high speed internet is that it gets disconnected frequently. So like Yahoo Messenger or Pidgin or Skype could go offline every 5… Read More »
Phpmyadmin auto login Phpmyadmin is a popular web based mysql database administration tool/frontend. It is used widely by php/mysql developers to manage database locally and remotely. When logging in to phpmyadmin, the user has to provide the mysql login credentials. However when working or developing on localhost , its better to make phpmyadmin login automatically… Read More »
Localisation Localisation involves changing various parts of application output like display of dates , time , numbers , language etc according to the standards of the geographical region of a user. Localisation is an important feature of applications that targets users across the globe and not just one region. So here are a set of… Read More »
Part 2 26. Avoid direct SQL query , abstract it $query = "INSERT INTO users(name , email , address , phone) VALUES('$name' , '$email' , '$address' , '$phone')"; $db->query($query); //call to mysqli_query() The above is the simplest way way of writing sql queries and interacting with databases for operations like INSERT, UPDATE, DELETE etc. But… Read More »
Part 1 11. Do not gzip output in your application , make apache do that Thinking of using ob_gzhandler ? No dont do that. It doesnt make sense. Php is supposed to write your application. Dont worry about how to optimise data transfer between server and browser inside Php. Use apache mod_gzip/mod_deflate to compress content… Read More »