Utilizing an EAVmodeling pattern allows for unlimited attributes on any product, category, customer, or order.  As is often  the case, the cost of flexibility is complexity EAV depletes a programmer’s ability to write ad-hoc queries against the data.

An understanding of EAV principles and how they have been modeled into Magento is highly  recommended before making changes to the Magento data or the Magento schema. But a detailed tutorial on the EAV database model  missing in  magento documentation.

EAV  modelling is consist of as  “vertical” modeling instead of “horizontal” modeling of columns in a database table. Instead of a table consisting of a number of columns, denoting attributes of a conceptual piece of data, the attributes are stored in one column of a separate table.

Let us consider a traditional user table as shown below

In an EAV database modelling, one conceptually records the data as three columns.
1)The entity: An entity is a core thing that is being modeled. It more like an Object like user,product etc.. For the above Example we can defile the user entity table ‘user_entity’ as below

2)The attribute or parameter: Entity attributes work much like a regular property of an object. The user ‘eav_attribute’ table  will be like below

3)The value: This is the value of each attribute. For the user value table ‘user_varchar’ will look like below

As you can see from looking at the above tables, adding a new attribute to a user simply involves adding a new record in the eav_attribute table. Adding a new attribute does not involve altering tables to add any new columns.This will make the objects or entities to easily manage adding new attributes to most parts of the system, while keeping the database schema consistent across installations.

I have mixed the script with Jquery. We can use Jquery’s bind method to bind the event but using bind we can’t handle the event properly. Using the following script we can easly customize the confirmation message and also it will work on IE and most of the common web browsers.

Actually jquery is not having any functional role in the script but using the following script we can avoid inline scripting and our code will look nice.

$(window).load(function() {
	window.onbeforeunload = navigateAway;
});
 
function navigateAway(e){
	var message = "Your confirmation message goes here.",
	e = e || window.event;
	// For IE and Firefox
	if (e) {
		e.returnValue = message;
	}
	// For Safari
	return message;
}

Related Links

• Using the OnBeforeUnload JavaScript Event
• Working with jQuery new Event object
• Working with jQuery Events

imageLoading: 'http://feelitfresh.com/wp-content/themes/feelitfresh/images/lightbox-ico-loading.gif',
imageBtnPrev: 'http://feelitfresh.com/wp-content/themes/feelitfresh/images/lightbox-btn-prev.gif',
imageBtnNext: 'http://feelitfresh.com/wp-content/themes/feelitfresh/images/lightbox-btn-next.gif',
imageBtnClose: 'http://feelitfresh.com/wp-content/themes/feelitfresh/images/lightbox-btn-close.gif',
imageBlank: 'http://feelitfresh.com/wp-content/themes/feelitfresh/images//lightbox-blank.gif'

Step 5 : Upload the lightbox directory to your wordpress theme folder. Better to inside the javascript directory /wp-content/themes/feelitfresh/javascript 6)Add the  following lines to your script.js file or to header tag or any of the javascript include file

 $(function() { $('a.lightbox').lightBox(); });

Step 6 : Open your theme folder in Appearance >Editor  and edit header.php and add the following lines inside the head tag

Step 7 : Add the class “lightbox” to the link  of the image. While inserting the image  you can click on the “File URL” button first to link the image to the image file

Step 8 : Then click on the image and edit the image settings  and select the the Advanced settings. Then change the “ CSS Class” to “lightbox” as below

It will act as a plugin and will load automatically that is we don’t need to include it any where in the theme files. It will help us to define a library and can reuse to fasten up our work while keeping code clean and easy to manage.

Most common use of the function.php is to do some actions while loading the WordPress initialization. We can add filters, actions and common initialization  script like sidebar widget  registration etc.  to the file functions.php

With HTTPS if anyone in between the sender and the recipient could open the message, they still could not understand it. Only the sender and the recipient, who know the “code,” can decipher the message.

Humans could encode their own documents, but computers do it faster and more efficiently. To do this, the computer at each end uses a document called an “SSL certificate” containing character strings that are the keys to their secret “codes.” SSL certificates contain the computer owner’s “public key.”

The owner shares the public key with anyone who needs it. Other users need the public key to encrypt messages to the owner. The owner sends those users the SSL certificate, which contains the public key. The owner does not share the private key with anyone.

We can use Jquery manipulation function like append, prepend, appendTo, prependTo, insertAfter,insertBefore for moving the options inside the select box.

The output of the above code will be like this

In short, Jetpack is an API for allowing you to write Firefox add-ons using the web technologies you already know like  HTML, CSS and Javascript etc.

It enables developers to create code packages that can be toggled on and off without the end user having to restart their browser. This is something that cannot be done with Firefox’s current add-ons system, but has been possible in third-party tools such as Greasemonkey, which allow users to pick and choose which scripts are active.

Besides no restarts and no breaking with updates, the most exciting aspect of Jetpack is how it can give users more control over what they see on a site, and how they can interact with its content. Like Ubiquity (another Mozilla Labs project), it also appears to be putting these add-ons right in the hands of users as soon as they visit a site with Jetpack controls, which means there’s less of a need to promote it in an add-ons directory to have users find it.

• Don’t copy variables for no reason
• Avoid doing SQL queries within a loop.
• Use single-quotes for long strings
• Use switch/case instead of if/els

Here is the PHP performance tips from Google blog from the PHP 10.0 blog.