... 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 .
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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.
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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,...
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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?
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Choosing a designer bridesmaid dress is one of the most daunting but enjoyable days of your life. Thats why Stanwells have sourced a collection of beautiful dresses for wedding guests, bridesmaids, a... Choosing a designer bridesmaid dress is one of the most daunting but enjoyable days of your life. Thats...
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We all need to laugh more, that is a fact. The world is such a serious place. If we can do something to make ourselves laugh more, that is a good thing. We all need to laugh more, that is a fact. The world is such a serious place. If...
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Dealing With Dry Skin In The Summer
Dry skin is not just a cause during the harsh winter months but also during the summer when the heat from the sun can take away much needed moisture. In looking for the best moisturizer for very dry skin, what sort of ingredients do we need to look for? Hot...