Pdf-xchange 0 Examples

Hisoblash
” tugmasi bosilgach esa, 1 unsiya necha kilogramm, gramm, karat, 
draxma, funt, pud, livr bo‘lishi ifodalanadi. Shuningdek, “
Uzunlik
”, “
Hajm
”, 
“
Tezlik
”, “
Maydon
”, “
Harorat
” bo‘limlar tanlansa ham ularga tegishli o‘lchov 
birliklarini bir-biri bilan ifodalaydi. 
Xulosa qilib aytganda, “Chiziqli funksiya va uning grafigi” mavzusini 
oʻqitishda elektron ishlanmadan foydalanish ta’lim sifatini oshirishga xizmat 
qiladi hamda oʻquvchilarda fanga boʻlgan qiziqishni oshiradi. 

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32 
CONTROLLERS IN CODEIGNITER 
Khashimov A. 
Tashkent University of Information Technology Ferghana branch 
The MVC pattern is popular in all languages and in particular PHP. MVC 
is the model, view, controller paradigm in programming. We’ll take a look at 
controllers now, as they are the portion of the MVC approach that handles 
incoming HTTP requests, and direct your application to take action. Controllers 
are used in all flavors of frameworks, and each has their own attributes. For this 
demonstration, we’ll focus on codeigniter. 
What is a Controller? 
A Controller follows a naming convention such that a class file is loaded 
based on the name of the first segment of the URI. 
For example if you have the URI http://www.site.com/index.php/sayhi/this 
will load a controller named sayhi.php. 
Let’s have a look at some code that would show what the 
sayhi.phpcontroller would actually look like. 
class Sayhi extends CI_Controller { 
public function index() 
{ 
echo 'I will now say hi!'; 
} 
} 
?> 
This controller file is saved in the application/controllers directory. Now to 
execute this script you would simply visit your URL similar to 
http://www.site.com/index.php/sayhi/ and you should see the output I will now 
say hi! 
Some key points to remember when dealing with creating your own 
controllers is that the name of the controller should be uppercase and it extends 
the parent controller class. This is so that your new controller automatically 
inherits all of the built in methods and functionality of the parent class. This is the 
benefit of using a framework, you get access to tons of functionality that has 
already been written for you. 
What is a Method? 
A method is also called a function in object oriented programming. So far 
we have only seen an index() function in our code. This is the default action that 
takes place if no action is specified in the second segment of the URI. Remember 
the format of MVC follows http://www.site.com/