Shulou(Shulou.com)06/01 Report--

This article mainly introduces "how to write Hello World programs with PHP". In daily operation, I believe many people have doubts about how to write Hello World programs with PHP. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful to answer the doubts of "how to write Hello World programs with PHP". Next, please follow the editor to study!

What does PHP mean?

PHP is a recursive acronym for hypertext preprocessor.

The first version of PHP was launched 26 years ago. PHP8 was released in November 2020, but PHP7 is still the most widely used version.

PHP runs on the Zend engine, which is the most popular implementation.

PHP is mainly used to make Web servers. It runs on the browser and can also be run on the command line.

So, if you don't want to display your code output in the browser, you can display it in the terminal.

Advantages of PHP

PHP has some of the advantages that make it so popular, and it has been the language of choice for Web servers for more than 15 years.

Here are some of the benefits of PHP:

Cross-platform: PHP is platform independent. You don't have to have a specific operating system to use it, because it runs on every platform, whether your computer is Mac, Windows, or Linux.

Open source: PHP is open source. The original code is available to anyone who wants to build on it. This is one of the reasons why Laravel, one of its frameworks, is so popular.

Easy to learn: PHP is not difficult for beginners to learn. If you already have programming knowledge, you can master it well.

PHP synchronizes with all databases: you can easily connect PHP to all databases, whether relational or non-relational. So it can connect to MySQL, Postgress, MongoDB, or any other database immediately.

Support community: PHP has a very supportive online community. The official documentation provides guidance on how to use these features, and you can easily solve the problem when you get stuck.

Who is using PHP?

Many established companies and tech giants use PHP to run their servers and do a lot of incredible things.

Facebook:Facebook uses PHP to support its website. In turn, the company contributes to the community by creating an implementation called Hip Hop for PHP.

Wikipedia: one of the world's largest sources of information on any subject, Wikipedia is built in PHP.

Content Management system (CMS): WordPress, the most popular content management system in the world, is built with PHP. Other content management systems, such as Drupal, Joomla, and Magento, are also built with PHP. Shopify can also be run on PHP.

Virtual hosting platforms: many hosting platforms, such as BlueHost, Site Ground, and Whogohost, use PHP to run their managed servers.

Is PHP dying?

Today, there is a heated debate about whether PHP is in decline. This is due to the emergence and increasing popularity of other languages (such as JavaScript (Node JS), Python, Golang, etc.) that are applicable to the server side.

This actually leads to a lot of interesting jokes about PHP.

But is PHP really dying? The answer is no. Although some people criticize it and claim that it is declining, almost 80% of websites today still use PHP to run servers. Therefore, if you visit 10 Web sites every day, it is possible that 8 of them use PHP.

In terms of job opportunities, PHP does rank better than many other programming languages on the employment platform. Many PHP developers make a living by making WordPress themes and plug-ins every year-the average PHP developer in the United States earns $86000 a year.

How to write your first Hello World program in PHP

Now that you know about PHP and its advantages, it's time to write your first Hello World program with it!

First, you must install PHP on your local computer. You can do this by installing XAMP (cross-platform, Apache, MySQL, and PHP) or WAMP (Windows, Apache, MySQL, and PHP) servers.

XAMP is available for all operating systems, while WAMP is only available for Windows. I will use WAMP.

Open the WAMP or XAMP server and make sure all services are running. If you are using the WAMP,WAMP logo, it should be displayed in green on your taskbar.

Open the C drive and look for the installation directory of the WAMP server. As far as I'm concerned, it's wamp64.

Open the installation directory, and then open the www folder.

Create a folder there and name it at will, then open it using the code editor.

Create an index.php file and paste the following code:

You can also put the "Hello World" text in a variable and display it in a browser using the echo system.

In PHP, you can declare variables using the dollar sign ($). In addition to the last item, your statement must end with a semicolon.

To run your code in a browser, open the browser and write it to localhost/the-folder-of-your-php-file/php-file.php in the address bar, and then press Enter.

Make sure your WAMP or XAMP server is running, otherwise it will not run.

You can see that the code runs successfully in the browser because I found the right file path.

Another advantage of PHP is that you can embed it in HTML. You can do this:

At this point in PHP Code This is the result of a PHP Code embedded in HTML, the study on "how to write Hello World programs in PHP" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.