... can be used for a lot of ... things, and is one of the most powerful ... ... ... on the web. Not to mention it's ... cheap and widely used. However, one t IntroductionPHP can be used for a lot of different things, and is one of the most powerful scripting languages available on the web. Not to mention it's extremely cheap and widely used. However, one thing that PHP is lacking, and in fact most scripting languages are, is a way to update pages in real-time, without having to reload a page or submit a form.The internet wasn't made for this. The web browser closes the connection with the web server as soon as it has received all the data. This means that after this no more data can be exchanged. What if you want to do an update though? If you're building a PHP application (e.g. a high-quality content management system), then it'd be ideal if it worked almost like a native Windows/Linux application.But that requires real-time updates. Something that isn't possible, or so you would think. A good example of an application that works in (almost) real-time is Google's GMail. Everything is JavaScript powered, and it's very powerful and dynamic. In fact, this is one of the biggest selling-points of GMail. What if you could have this in your own PHP websites as well? Guess what, I'm going to show you in this article.How does it work?If you want to execute a PHP script, you need to reload a page, submit a form, or something similar. Basically, a new connection to the server needs to be opened, and this means that the browser goes to a new page, losing the previous page. For a long while now, web developers have been using tricks to get around this, like using a 1x1 iframe, where a new PHP page is loaded, but this is far from ideal. Now, there is a new way of executing a PHP script without having to reload the page. The basis behind this new way is a JavaScript component called the XML HTTP Request Object. See http://jibbering.com/2002/4/httprequest.html for more information about the component. It is supported in all major browsers (Internet Explorer 5.5+, Safari, Mozilla/Firefox and Opera 7.6+).With this object and some custom JavaScript functions, you can create some rather impressive PHP applications. Let's look at a first example, which dynamically updates the date/time.Example 1First, copy the code below and save it in a file called 'script.js': Article Tags: Http Request Object, Without Having, Http Request, Request Object, Code Below, File Called, Make Sure Source: Free Articles from ArticlesFactory.com .
Top blog stories
A review of Idmobile.com
Idmobile.com offers both pay-as-you-go and contract plans. Pay-as-you-go plans are ideal for customers who don't want to be tied down to a long-term contract, and they can purchase bundles of data, minutes, and texts as and when they need them.
Idmobile.com offers both pay-as-you-go and contract plans. Pay-as-you-go plans are ideal for customers who don't want to be tied down to a long-term contract, and they can purchase bundles of data, minutes, and texts as and when they need them.
AO.co is a trusted expert in TVs, washing machines, clothes dryers and other household appliances. AO.com is one of the largest retailers in the UK and it specializes in electronics, clothes and home furniture.
At Three, we believe phones are good. They just make life better. Easier. And more fun. But
we all need to find a balance that works for us. Our mission is to help our customers use
their phones to live their best lives.
We make your life easier
Since 1992, we’ve been helping customers get the best deal on their dream phone. We firmly believe in giving you the highest quality, for the lowest price. That’s why we work with three of the UK’s leading networks to do all the haggling for you,...
At Halfords, we're all about the journey. With more than 700 stores with over 10,000 colleagues, we're the UK's leading retailer of automotive and cycling products. We are also the leading operator in MOT, tyres, car servicing and car repairs - pleasing more than 750,000 customers every year.
It's important to us that everyone gets great customer service and can enjoy our products, no matter their level of sight. So, if you're blind, partially sighted or struggle to see or read the screen, we’ve a range of features to help you get the most from our products and...
Look iconic, without the hassle— using Nasty Gal discount codes, you can shop your favorite pieces for way less by simply entering one of our promotional codes (of your choice) at the checkout. From delivery offers, to promo deals, we keep ‘em coming, so you always have the offer you...
The Covid-19 has caused the school and universities to shut down around the world creating a major issue in Learning and Education. As this virus spreads through the interaction and if social distanci... The Covid-19 has caused the school and universities to shut down around the world creating a major...
Why its Important to Manage Your Holiday Calendars?
A printable calendar 2021 is a prominent online platform where you download printable calendars of your choice. These calendars can be customized as per our client requirement with photo, text, logo, or any other image. If you are thinking of planning a dream vacation tour with family and kids but...
Flannel sleepwear is without a doubt one of the most popular ladies sleepwear styles. But do you have any idea what it is exactly? What it is made of? Flannel sleepwear is just one of the many ladies sleepwear styles that are popular today. But do you have any idea...
You have to tackle the challenges that face you by adopting and applying things that work well towards the attainment of your personal goals. A habitual development assists you when trying to achieve goals. Article Tags: Personal Goals, Habitual Developments Source: Free Articles from ArticlesFactory.com
What is your main concern when it comes to buying skin care? For many it is knowing what to buy in the first place and do you go for a brand or something cheap? Botanical extracts are all the rage in beauty and skin care products, and for good reason....
There are a vast range of acne products that are available on the market. Obviously you want to be able to ensure that what you buy will help to clear your skin without any harsh side-effects. There are several natural supplements for acne that could help reduce pimples. If you...
Discover the fast, cost affective and long lasting solution to your Cosmetic Dentistry needs. No longer do you need to suffer silently with Teeth that have Worn Enamel or are showing excessive Wear and Tear. Stained Teeth can now also be a thing of the past with the Glamsmile Porcelain...
Women's robes are without a doubt one of the most useful ladies sleepwear styles available today. From refined and worldly to fresh and provocative, there are umpteenth varieties of robes in stock that suit virtually every taste and need. Here we will take a look at some of the more...
For example, most restaurants-especially national franchises have their own website and and allows you to sign up as a member to their website and you get emails that alert you about special deals going on at their restaurant. Source: Free Articles from ArticlesFactory.com
We hear our dentist say Dental Implants and we shiver in fear. This is always due to not understanding the procedure. Once you discover the truth about things such as Technological advances, Procedures required, Time needed for it all and the stunning realistically looking results you will change your mind...
By Anthony Ricigliano - News And Advice by Anthony Ricigliano -- The study of coins, also known as numismatics, has its origins going back to the first exchange of the metal discs for the purpose of commerce. While still hotly debated, its likely that the first coin was minted circa...
These days, there is a great variety of brassiere alternatives. Great styles include everything from full bras and minimizer bras to push up bras and demi cup bras, the choice goes on and on! It can be awe-inspiring trying to determine the different bra styles. The essential thing to bear...
Search topic
Choosing Full Bras
These days, there is a great variety of brassiere alternatives. Great styles include everything from full bras and minimizer bras to push up bras and demi cup bras, the choice goes on and on! It can be awe-inspiring trying to determine the different bra styles. The essential thing to bear...