Ikhlaque Ahmed - Programming Blogs

ReactJs Top Hooks List

noreply@blogger.com (iamikhlaque) — Wed, 05 Oct 2022 09:17:00 +0000

In today article we are going to show you some reactjs hooks which can help you to increase your reactjs knowledge.

What is hooks?

Hooks are a new addition in React 16.8. It allows you to use state and other React features without writing a class. Hooks are the functions which "hook into" React state and lifecycle features from function components.

Following are some hooks which are most useful for you

1. useState Hook

React useState() is a built in hooks or function which comes with React library. When you want to use “useState” you need to first import in your application using following code sample. useState() only work with functional components. This will not work with Class components in React.

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2. useEffect Hook

The useEffect() hook allows us to run side effects on your functional components. Side effects is a general concept about how functions behave which are not predictable. A function is supposed to have side effects when it tries to change something outside of its body. useEffect() also can perform data fetching side-effect using API.

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3. useContext Hook

In simple definition react context is use to handle state globally without using or pass any props in the components. Lets understand why and how we can use “useContext()” hook in our program.

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4. useQuery Hook

React Query provides us with custom hooks like “useQuery” for retrieving data. Under the hood, these hooks do a lot of things such as caching data after initial retrieval, fetching data in the background, etc.

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Latest CodeIgniter interview questions and answers

noreply@blogger.com (iamikhlaque) — Thu, 14 Jul 2022 12:39:00 +0000

Are you looking jobs in CodeIgniter? Then you are at the right place. We provide you with the best CodeIgniter interview Question and Answers in this article blog. CodeIgniter is an open-source software rapid development web framework, for use in building dynamic web sites with PHP. CodeIgniter is loosely based on the popular model-view-controller (MVC) development pattern. There are numerous leading companies that offer lots of job positions in CodeIgniter like PHP Developer with CodeIgniter Frame work, Senior PHP Developer, Backend Developer CodeIgniter etc.

Q1. Explain Codeigniter Architecture?

CodeIgniter is designed to deliver maximum performance in less time within a clean environment. To achieve this, each developing process is designed in a simplified way.

From technical point of view it is dynamically instantiation (libraries are loaded on request which makes it light-weighted), loose coupling. (components rely very less on each other) and component singularity (each class and its functions are narrowly focused only towards their purpose).

Q2. Explain MVC in CodeIgniter?

CodeIgniter framework is based on MVC pattern. MVC is a software that gives you a separate logical view from the presentation view. Due to this, a web page contains minimal scripting.

Model — The Controller manages models. It represents your data structure. Model classes contain functions through which you can insert, retrieve or update information in your database.
View — View is the information that is presented in front of users. It can be a web page or parts the page like header and footer.
Controllers — Controller is the intermediary between models and view to process HTTP request and generates a web page. All the requests received by the controller are passed on to models and view to process the information.

Q3. What is model and how you can load model in CodeIgniter?

The Controller manages models. It represents your data structure. Model classes contain functions through which you can insert, retrieve or update information in your database.

models are loaded as well as called inside your controller methods. For loading a model, you must use the below-given method:

$this->load->model('modelName');

Include the relative path from the directory of your model, if your model is placed inside a sub-directory. Consider an example, you have a model which is placed at application/models/author/AllAuthor.php you can load it by using: $this->load->model(‘author/AllAuthor’);

Q4. How can you connect models to a database manually?

Using following syntax you can load the database.

$this->load->database();

There is another method available which is automatice for that you have to add database library in autoload.php

Example

Path : application/config/autoload.php $autoload['libraries'] = array('database');

Q5. Explain view in CodeIgniter and how we can load the view?

View folder contains all the markup files like header, footer, sidebar, etc. They can be reused by embedding them anywhere in controller file. They can’t call directly, and they have to be loaded in the controller’s file.

You can create file in application/views folder. For example, we have created a file Welcome.php,

You can call this Welcome.php view file in controller using below code.

<?php defined('BASEPATH') or exit('No direct script access allowed'); class Index extends CI_Controller { public function __construct(){ parent::__construct(); } public function index(){ $this->load->view('welcome'); } }

Q6. How will you call a constructor in CodeIgniter?

We will call constructor in CodeIgniter using below method

Example

<?php defined('BASEPATH') or exit('No direct script access allowed'); class Index extends CI_Controller { public function __construct() { parent::__construct(); } }

Q7. Explain the basic Url Structure in Codeigniter?

The basic URL structure is developerdiary.in/class/function/ID.

In this class represents controller’s class that needs to be invoked.
“ function” is name of method which is called.
“ ID: is an additional parameter that is passed to controllers.

Q8. What is the default method name in CodeIgniter?

By default controller call index method. If you want call another method then you shoud define this method in controller and call in the url

deveoperdiary.in/ControllerName/ YourCustomFunctionName

Q9. What is a helper in CodeIgniter?

Helpers are the group of functions that are used to assist the user to perform specific tasks.

URL Helpers: used to create the links.
Text Helpers: used for text formatting.
Cookies Helpers: used for reading and setting cookies.

Q10. How can you load multiple helper files?

Using following sample code we can load multiple helper.

$this->load->helper( array('helper1', 'helper2', 'helper3', 'helperxxxxx') );

Feel free to Subscribe for more content 🔔, clap 👏🏻 and share the article With anyone you’d like.

Originally published at https://www.developerdiary.in on July 13, 2022 here you will get more interview questions and answers. 🤟 🤘 🤙🙏🏼

Function Overloading And Overriding In PHP

noreply@blogger.com (iamikhlaque) — Fri, 08 Jul 2022 19:17:00 +0000

Function overloading and overriding is the Object Oriented Programming feature in PHP. Function overloading means multiple function have the same name but different parameters. But in case of function overriding, more than one functions will have same method signature and number of arguments.

PHP doesn’t support function overloading directly like other languages such as C++, JAVA etc. But we can overcome this issue with using the PHP magic method __call(). So let’s see how overloading and overriding in PHP works.

Function Overloading In PHP

Function overloading contains same function name and that function performs different task according to number of arguments.

Example

<?php
   class Shape {
      const PI = 3.142 ;
      function __call($name,$arg){
         if($name == 'area')
            switch(count($arg)){
               case 0 : return 0 ;
               case 1 : return self::PI * $arg[0] ;
               case 2 : return $arg[0] * $arg[1];
            }
      }
   }
   $circle = new Shape();
   echo $circle->area(3);
   $rect = new Shape();
   echo $rect->area(8,6);
?>

Output : This will produce the following output

9.42648
48

Function Overriding In PHP

Function overriding in PHP is quite easy. Overriding is the process of modifying something of the inherited method. Means in function overriding, the parent and child classes have the same function name with and number of arguments

In belwo example you see two classes Base and Derived. Derived cass extends to Base. Which means Derived can access parent class. Here you see parent has demo() function and child class also demo() function with same name and same argument. Here you see function overriding scenario where child class override the base class function.

<?php
   class Base {
      function display() {
         echo "\nBase class function declared final!";
      }
      function demo() {
         echo "\nBase class function!";
      }
   }
   class Derived extends Base {
      function demo() {
         echo "\nDerived class function!";
      }
   }
   $ob = new Base;
   $ob->demo();
   $ob->display();
   $ob2 = new Derived;
   $ob2->demo();
   $ob2->display();
?>

Output : This will produce the following output

Base class function!
Base class function declared final!
Derived class function!
Base class function declared final!

Original article publish here.>>

Get Best PHP Interview Questions and Answers

The Requested Url /Phpmyadmin/ Was Not Found On This Server

noreply@blogger.com (iamikhlaque) — Mon, 27 Jun 2022 12:09:00 +0000

What Is phpMyAdmin

phpMyAdmin is an open-source software tool introduced on September 9, 1998, which is written in PHP. Basically, it is a third-party tool to manage the tables and data inside the database. phpMyAdmin supports various type of operations on MariaDB and MySQL. The main purpose of phpMyAdmin is to handle the administration of MySQL over the web.

phpMyAdmin has a GUI application which used to mange the database. Here we can create a database, table and execution of mysql query using phpMyAdmin GUI

Our Problem : phpMyAdmin url not found. Here you will find the Solution Here

The difference between React vs AngularJs

noreply@blogger.com (iamikhlaque) — Sun, 30 Jul 2017 08:22:00 +0000

React and AngularJs are currently using Travel and News companies.
Main reason difference between AngularJs and ReactJs is

AngularJS

1. AngularJs is MVC framework library. It is used for Two-way data binding.
2. AngularJs is an App development framework.

ReactJS

1. React Js is a Library. It is used for One-way data binding.
2. ReactJs is an interface development framework.

AngualrJs is a Javascript Framework. Where we can add HTML tags with Scrip tag. It is a Library written in Javascript.

AngularJs developed by GOOGLE. AngularJs similar to Backbone or JavascriptMVC. It is a complete solution for rapid development.

Following are some Features of AngularJs.

1. REST Easy: RESTful action quick communication between server to the client.
2. Extends HTML: AngularJS extends HTML with ng-directives. The ng-app directive defines an AngularJS application. The ng-model directive binds the value of HTML controls (input, select, textarea) to application data. The ng-bind directive binds application data to the HTML view.

3. Makes HTML your Template: In AngularJS template is written in HTML which contains elements and attributes. AngualrJs create a template with information from the model and controller to render view in the browser. Getting started with AngularJS is incredibly easy. Just a few attributes added to your HTML, and you can have a simple Angular app.

AngualrJs Simple Example:






  Name:

AngularJS Expressions Example






  First Expressions: {{ 8 + 8 }}

ReactJs ReactJs developed by Facebook. React is a Javascript Library.

Following are some Features of ReactJs.

1. Lightweight DOM For Better Performance
2. Easy Learning Curve
3. Components Support And Little Dependencies

What is difference between get and post method in php

noreply@blogger.com (iamikhlaque) — Sat, 29 Jul 2017 09:17:00 +0000

What is HTTP?

The Hypertext Transfer Protocol (HTTP) is designed to enable communications between clients and servers. HTTP works as a request-response protocol between a client and server.

Two HTTP Request Methods commonly used for request-response between a client and server: GET and POST

The GET Method
Following example which shows you how to use get method.
http://www.example.com/test/demo_form.php?name1=value1&name2=value2

Following are GET Request Method Points.

1. Request can be cached
2. Requests can be bookmarked
3. Requests remain in the browser history
4. Requests have length restrictions
5. Requests should be used only to retrieve data
6. Requests should never be used when dealing with sensitive data
7. Maximum path length of 2,048 characters
8. Data visible to everyone in URL.
9. GET is less secure compared to POST because data sent is the URL.

Following are POST Request Method Points.

1. Requests are never cached
2. Requests do not remain in the browser history
3. Requests cannot be bookmarked
4. No restriction data lenght
5. Requests have no restrictions on data length
6. Data is not display in URL.
7. POST is a little safer than GET because the parameters are not stored in browser history.

We just started this developer diary for a beginner programmer to find a technical solution which we went through with our experience. If anyone to be a part of this please feel free share with us your problem with solutions. So we can share with more needed coder.

Original article publish here >>

Connect to Amazon EC2 instance using Filezilla and SFTP

noreply@blogger.com (iamikhlaque) — Sun, 23 Jul 2017 07:06:00 +0000

Hello friends this tutorial help you how to connect AWS EC2 instance using Filezilla and SFTP.

First you need to have .pem file. This .pem file is created when you are creating a new instance in your AWS account.

Follow below steps to connect AWS EC2 instance.

1. Start Filezilla. Goto preference ->connection->SFTP

2. Add .pem file then you will get prompt to convert .pem file.

3. Save with same name.

4. Add Host address. You will get public ip from AWS EC2 instance.

5. Username ec-2 or ubuntu. Username you will find in connect tab.

6. Port : 22

7. Connect.

8. Finish.

Magento – Newsletter's emails stuck in Queue

noreply@blogger.com (iamikhlaque) — Sat, 22 Jul 2017 09:06:00 +0000

If you are scratching your head to figure out why not Magento sending newsletter email. Here we got the same problem. You can check on Problem with Solution.

Problem

We installed newsletter pop up extension which was working fine. But after some days we saw newsletter emails are not working.

We tried many solutions, Check Magento newsletter setting and also check cronjob code. But no luck. Then we have tried to uninstall recently installed extensions on the server then we found MailChimp and Newsletter POP extension are conflicting with each other.

If you have a facing same problem then you can apply the following solution

1. First, check cronjob properly set or not.

sudo crontab -e */5 * * * * /path/to/php -f /path/to/cron.php

2. This solution we found on ebizmarts forum.

Comment out line 118 of app/code/community/Ebizmarts/MailChimp/Model/Observer.php

//$subscriber->setImportMode(true); //commented out to enable Magento to send emails

In app/code/community/Ebizmarts/MailChimp/Model/Subscriber.php

Rewrite the public function sendConfirmationSuccessEmail() on line 29 with the following code

public function sendConfirmationSuccessEmail(){
  if (Mage::getStoreConfig(Ebizmarts_MailChimp_Model_Config::GENERAL_ACTIVE)) {
  /* commented out to enable Magento to send emails
  if (Mage::getStoreConfig(Ebizmarts_MailChimp_Model_Config::GENERAL_ACTIVE)) {
  return $this;
  } else {
  } else {*/ 
  return parent::sendConfirmationSuccessEmail();
  }
  /* } */
  }
}

Free AWS EC2 Ubuntu Instance Website setup

noreply@blogger.com (iamikhlaque) — Sat, 15 Jul 2017 06:07:00 +0000

Amazon Web Service is a cloud platform which given us to create free hosting in both platform like Windows and Linux.

Here we are working on Ubuntu setup. Where we will install Apache2, PHP and MySQL.

1. First you have to create new account in AWS. If you have existing account then no need to create.
2. After login you have to select EC2 option then you enter EC2 Dashboard.
3. Click Launch Instance
4. Select Free tier Eligible Ubuntu option.
5. Add New Volume EBS.
6. Add New Tag.
7. Add Security Group.

Type : SSH
Protocol: TCP
Port : 22
Source : Anywhere

Type : HTTP
Protocol : TCP
Port : 80
Source : Anywhere

8. Review and Launch
9. Create a New Pair Key. Download Key.
10. Using Puttygen.exe software create public and private key.
11. Login SSH using putty.exe

Now we are ready to install Apache2, PHP, MySQL.

Command 1 ( Update Ubuntu server )

sudo apt-get update
sudo apt-get dist-upgrade

Command 2 ( Install apache2 server )

sudo apt-get install apache2

Command 3

sudo a2enmod rewrite

Command 4 ( Install php available version )

sudo apt-get install php

Sometime php7 not executing on Apache server. For that you need to just run following command

sudo apt install php libapache2-mod-php

Command 5 ( Start apache2 server )

sudo service apache2 restart

Command 6 ( Install MySQL server )

sudo apt-get install mysql-server

Command 7 ( Install PHPMyAdmin )

sudo apt-get install phpmyadmin
vim /etc/apache2/apache2.conf

Add the following to the bottom of the file:

# phpMyAdmin Configuration
Include /etc/phpmyadmin/apache.conf

And, restart Apache 2 with the following command:

service apache2 restart

Login SSH using Putty.exe

noreply@blogger.com (iamikhlaque) — Sat, 15 Jul 2017 05:58:00 +0000

Login SSH using Putty.exe Putty is an SSH and Telnet client software, developed by Simon Tatham for the Windows platform.

Putty is open source software Follow below steps which can help you to login SSH using putty.

1. Download Putty.exe

2. Enter IP.

3. Select PPK file path provide by your hosting provider or if you are using AWS then you will get ppk file from there also.

How to clear the cache of client browsers?

noreply@blogger.com (iamikhlaque) — Tue, 11 Jul 2017 05:29:00 +0000

Hello friends today we will learn how to clear the cache client browsers.

This technique is very simple. Just add a version parameter to the URL string which is either a random string or a random number.

If you change your sites CSS and upload on the server you will get old result only. For solve this problem, simply add ?ver=1.1 to the CSS import at the head of the file. So the browser teat as a different file.

Example:

<link href="css/style.css" rel="stylesheet" type="text/css" />
Becomes

<link href="css/style.css?ver=1.1" rel="stylesheet" type="text/css" />
Same you can apply for JavaScript files.

How to send emails using PHPmailer and GMAIL SMTP

noreply@blogger.com (iamikhlaque) — Sat, 08 Jul 2017 07:18:00 +0000

Here I have tried how to send PHPMailer with attachement using SMTP configuration. For SMTP Configuration we here used GMAIL Auth. You can used any Auth like SMTP2GO, SendGrid.

Download PHPMailer library.

PHPMailer Sample Code

Addd or Copy paste the following code in your editor and save with any filename with extension ".php" and try in your live server or local server. But Make sure you have to connect with internet with proper Auth details

<?php

require_once('phpmailer/PHPMailerAutoload.php');

$mail = new PHPMailer();
$mail->CharSet =  "utf-8";
$mail->IsSMTP(); // Set mailer to use SMTP
$mail->SMTPDebug = 1;  // Enable verbose debug output
$mail->SMTPAuth = true; // Enable SMTP authentication
$mail->Username = "xxx@example.com"; //Your Auth Email ID
$mail->Password = "xxxxxx"; //Your Password
$mail->SMTPSecure = 'tls'; // Enable TLS encryption, `ssl` also accepted
$mail->Host = "smtp.gmail.com"; // SMTP 
$mail->Port = "587"; // TCP port to connect to

$mail->setFrom('xxx@example.com', 'From Name');
$mail->AddAddress("abc@gmail.com" , "Recipient name"); // Add a recipient

$mail->addAttachment('path/file.png');         // Add attachments

$mail->Subject = "Subject Line";
$mail->Body = "Your Message or Content";
$mail->ContentType = "text/html";

if($mail->Send()){
 $str = "OK"; 
}else{
 $str = "ERR"; 
}

//End PHPMailer Code Here
?>

How to use SytaxHighlighter code with Blogger

noreply@blogger.com (iamikhlaque) — Thu, 06 Jul 2017 17:31:00 +0000

# Add Sytax Highlighter to your Blogger Code Samples After trying many solutions to implement syntax highlighting on Blogger, I came across [Alex Gorbatchev's](http://alexgorbatchev.com/SyntaxHighlighter/) Javascript plugin. Implementing it is very easy, however, I couldn't get it to work on secure (https) URLs. Add the below code in your `head` tag.







http://alexgorbatchev.com/pub/sh/current/scripts/shCore.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushBash.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushCpp.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushCSharp.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushCss.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushDiff.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushJava.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushJavaFX.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushJScript.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPerl.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPhp.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPlain.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushPython.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushRuby.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushSql.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushVb.js
http://alexgorbatchev.com/pub/sh/current/scripts/shBrushXml.js

Sample code for implement.

You might be wondering why I have given the `pre` tag `brush: js` as classes. You need to mention the syntax highlighting that needs to be used to highlight your code. You can find the full list of supported syntax declarations [here](http://alexgorbatchev.com/SyntaxHighlighter/manual/brushes/).

Select active menu using jquery

noreply@blogger.com (Unknown) — Sat, 01 Jul 2017 10:02:00 +0000

Most of the developer has an issue to select active menu in the same header. So here we try with the following example. May be this example will help you, If you have any doubt or question you can comment us. We will reply you ASAP.


Home
About us
Contact us>/li>

Suppos here we click on Home menu. Then home li should be selected. My URL is : http://www.example.com/home

Output :


Home
About us
Contact us>/li>

Import CSV to Database using PHP

noreply@blogger.com (Unknown) — Mon, 30 Jan 2017 08:11:00 +0000

Import csv database using PHP. Follow the following code and you will done with CSV import script using PHP. If you have any questions you can feel free comment we will reply you ASAP.

PHP Code

       

  <?php
 
   if(isset($_POST["Import"]))
   {
 
   $filename=$_FILES["file"]["tmp_name"];
 
   if($_FILES["file"]["size"] > 0)
   {
 
   $file = fopen($filename, "r");
           mysql_query('truncate table table');
           while (($data = fgetcsv($file, 10000, ",")) !== FALSE)
           {
              $sql = "INSERT into table(name,email,avg,sr,runs,wickets,hs,sixes,fours,longsixes,created) values('$data[0]','$data[1]','$data[2]','$data[3]','$data[4]','$data[5]','$data[6]','$data[7]','$data[8]','$data[9]', now())";
              mysql_query($sql);
           }
           fclose($file);
           echo "CSV File has been successfully Imported";
   }
   else
   echo "Invalid File:Please Upload CSV File";
 
   }
   ?>

HTML Code

       
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
      <title>Import CSV/Excel file</title>
   </head>
   <body>
      <form enctype="multipart/form-data" method="post">
         <table border="1" width="40%" align="center">
            <tr >
               <td colspan="2" align="center"><strong>Import CSV</strong></td>
            </tr>
            <tr>
               <td align="center">CSV/Excel File:</td>
               <td><input type="file" name="file" id="file"></td>
            </tr>
            <tr >
               <td colspan="2" align="center"><input type="submit" name="Import" value="Import"></td>
            </tr>
         </table>
      </form>
   </body>
</html>

WP Migrate DB

noreply@blogger.com (Unknown) — Tue, 05 Jul 2016 16:23:00 +0000

Friends used WP Migrate DB plugin. Which is very easy to migrate your database from one server to another without any loss information.

Trust me I have used this plugin in many website.

WP Migrate DB exports your database as a MySQL data dump (much like phpMyAdmin), does a find and replace on URLs and file paths, handles serialized data, then allows you to save it to your computer as an SQL file. To complete the migration, you need to use a database management tool (e.g. phpMyAdmin) to import the SQL file to your database, replacing your existing database. It is perfect for developers who need to migrate fresh data from the production site to their local install, or migrate their locally developed site to a staging or production server.

Check Link Click Here

Enabling Gzip Compression of PHP, CSS, and JS Files Without mod_deflate

noreply@blogger.com (Unknown) — Tue, 05 Jul 2016 16:18:00 +0000

For enable Gzip compression using mod_deflate add following lines to your .htaccess file AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/javascript application/x-javascript But those who don’t allow the mod_deflate module and run PHP in CGI/FastCGI mode you can’t go with the easy method. So, to serve up your PHP, CSS, and JS files you can try the following method.

Step 1: PHP Configuration Add or modify the following lines in your custom php.ini file

       


output_handler = Off
zlib.output_compression = On

zlib.output_handler = ob_gzhandler

Now this will take care of gzipping all PHP files. Step 2: .htaccess Configuration Add the following lines to the bottom of a .htaccess file in the root of your website.




RewriteEngine On

RewriteRule ^(.*\.js) gzip.php?type=js&file=$1

RewriteRule ^(.*\.css) gzip.php?type=css&file=$1

This will redirect all css and js requests files through gzip.php, which we will create in the next step. Step 3: File Processing PHP Script The following PHP script will inherently use the PHP compression you’ve already enabled and also add headers to your files take advantage of your client’s browser cache to make subsequent loads faster. Create a file named gzip.php in your website’s root and add the following lines to it:



<?php

if(!ini_get('zlib.output_compression')){ die(); }

 $allowed = array('css','js');

 if(isset($_GET['file']) && isset($_GET['type']) && in_array(substr($_GET['file'],strrpos($_GET['file'],'.')+1), $allowed)){
  $data = file_get_contents(dirname(__FILE__).'/'.$_GET['file']); // grab the file contents

  $etag = '"'.md5($data).'"';
  header('Etag: '.$etag);

  switch ($_GET['type']) {
  case 'css':
   header ("Content-Type: text/css; charset: UTF-8");
  break;

  case 'js':
   header ("Content-Type: text/javascript; charset: UTF-8");
  break;
  }

  header('Cache-Control: max-age=300, must-revalidate'); //output the cache-control header
  $offset = 60 * 60;
  $expires = 'Expires: ' . gmdate('D, d M Y H:i:s',time() + $offset) . ' GMT'; // set the expires header to be 1 hour in the future
  header($expires); // output the expires header

  if ($etag == $_SERVER['HTTP_IF_NONE_MATCH']) {
   header('HTTP/1.1 304 Not Modified');
   header('Content-Length: 0');
  } else {
   echo $data;
  }
 }
?>

Great! With these steps in place your css and javascript files will be processed by gzip.php and output using PHP’s gzip compression library (zlib). This method can be extended to more filetypes by adding to the allowed file types in gzip.php and adding more lines to your .htaccess file.

How to check UBUNTU version?

noreply@blogger.com (Unknown) — Tue, 05 Jul 2016 16:09:00 +0000

When I was learning Ubuntu it was very difficult to know Ubuntu version.

Refer following step which can help you to know Ubuntu version.

Step 1: Open the terminal.
Step 2: Enter the lsb_release -a command.
Step 1: Open “System Settings” from the desktop main menu in Unity.
Step 2: Click on the “Details” icon under “System.”
Step 3: See version information.

Or

Use this in the terminal to show the details about the installed Ubuntu "version":

lsb_release -a

How to work code-igniter project in sub-folder

noreply@blogger.com (Unknown) — Tue, 19 Feb 2013 06:56:00 +0000

When this happens when you have 2 .htaccess files in the server. Very simple solutions just add following code and your code-igniter project will work in sub-folder.


RewriteEngine on
RewriteCond $1 !^(index\.php|images|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /admin/index.php?/$1 [L]

CodeIgniter Subfolder .htaccess setup

noreply@blogger.com (Unknown) — Mon, 28 Jan 2013 09:57:00 +0000

When you are going to setup CodeIgniter in live sufolder. There you need to create .htaccess file.

RewriteEngine on
RewriteCond $1 !^(index\.php|images|robots\.txt)
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /admin/index.php?/$1 [L]

GET and POST Method Call in Python

noreply@blogger.com (Unknown) — Mon, 26 Nov 2012 07:01:00 +0000

GET METHOD

get method is very easy to call without any difficulty you can call

HTML

<html>
<head>
    <title>FeedBack</title>
</head>
<body>
    {% if errors %}
    <ul>
        {% for error in errors %}
        <li>{{error}}</li>
        {% endfor %}
    </ul>
    {% else %}
         <p>You searched for: <strong>{{ q }}</strong></p>
    {% endif %}
    <h1>Search</h1>
    <form action="/search/" method="get">

        <p>Search: <input type="text" name="q"></p>
        <input type="submit" value="Submit">
    </form>
</body>
</html>

View

def feedback(request):
    errors = []
    if 'q' in request.GET:
        q = request.GET['q']
        if not q:
           errors.append('Enter a search query')
        else:
            return render_to_response('feeback_form.html',{'q':q})
    return render_to_response('feeback_form.html',{'errors': errors})

In POST method you need to decalare csrf token

Put below the form {% csrf_token %}

declare in view from django.views.decorators.csrf import csrf_exempt

and just above your def @csrf_exempt

Enabling the MySQL Event Scheduler

noreply@blogger.com (Unknown) — Thu, 11 Oct 2012 12:51:00 +0000

MySQL events are executed by a special event scheduler thread. It's disabled by default. MySQL 5.1 Event Scheduler, Conceptually, this is similar to the idea of the UNIX crontab (also known as a “cron job”)
The MySQL Event Scheduler manages the scheduling and execution of events.

If you are running larg number of data like Shopping Cart, Any Portals that time we need to handle data.

Here is Simple example

Create Table

CREATE TABLE user
(
user_id INT AUTO_INCREMENT,
user varchar(250),
created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (user_id)
) ;

Start phpmyadmin

SET GLOBAL event_scheduler = ON;

Creat New Event

CREATE EVENT newEvent
ON SCHEDULE EVERY 1 DAY
DO
DELETE FROM user WHERE created_at = DATE_SUB(NOW(), INTERVAL 10 DAY);

Finished.............. :)

Pan Card Validation Using Javascript

noreply@blogger.com (Unknown) — Fri, 05 Oct 2012 06:37:00 +0000

To Validate PanCard you have to use below function

function ValidatePAN(Obj) {
        if (Obj.value != "") {
            ObjVal = Obj.value;
            var panPat = /^([a-zA-Z]{5})(\d{4})([a-zA-Z]{1})$/;
            if (ObjVal.search(panPat) == -1) {
                alert("Invalid Pan No");
                Obj.focus();
                return false;
            }
        }
}

<input type="text" ID="textPanNo" MaxLength="10" onblur="ValidatePAN(this);">

Random post generate in wordpress

noreply@blogger.com (Unknown) — Thu, 13 Sep 2012 07:13:00 +0000

You have to first know default args of wordpress


<?php $args = array(
    'numberposts'     => 5,
    'offset'          => 0,
    'category'        => ,
    'orderby'         => 'post_date',
    'order'           => 'DESC',
    'include'         => ,
    'exclude'         => ,
    'meta_key'        => ,
    'meta_value'      => ,
    'post_type'       => 'post',
    'post_mime_type'  => ,
    'post_parent'     => ,
    'post_status'     => 'publish',
    'suppress_filters' => true ); ?>

Use get_posts function and pass all the args which you have need.

Example below

Call function

<?php wp_get_theme_post(); ?>

in your templates

Create function in function.php file

In if ( ! function_exists ( 'wp_get_theme_post' ) ) : 

function wp_get_theme_post(){
?>
    <?php
    $args = array('numberposts'     => 5, 'orderby' => 'rand' );

    $rand_posts = get_posts( $args );
    foreach( $rand_posts as $post ) : ?>
        <li><a href="<?php echo $post->guid; ?>"><?php echo $post->post_title; ?></a></li>
    <?php endforeach; ?>
<?php
}


endif;

In the above function i have used simple args (numberpost, orderby).

Reset the auto increment value for a MySQL table

noreply@blogger.com (Unknown) — Tue, 28 Aug 2012 12:51:00 +0000

The following example changes the auto increment value for the table named "applytable" to 100. This means that the next time you insert a record into this table the value of the auto incremental primary key will be 100.

If the highest value for the column is already greater than 100 then it will be set to the highest value plus 1.

ALTER TABLE mytable AUTO_INCREMENT = 100

The relevent info are highlighted with red circles in the screenshot below.

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