Scraper scripts often need to extract all links on a given page. This can be done in a number of ways like regex, domdocument etc. Here is simple code snippet to do this using domdocument. /* Function to get all links on a certain url using the DomDocument */ function get_links($link) { //return array $ret… Read More »
Often numbers are to be written with a proper suffix, like 1st, 2nd, 3rd, 15th, 21st and so on. So here is a quick function to do the same for a number. Technique 1 /* This function will add st, nd, rd, th to the end of numbers */ function ordinal($i) { $l = substr($i,-1);… 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 »
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 »
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 »