Can php run in html file

Как подключить PHP к HTML?

PHP — это встраиваемый серверный язык программирования. Большая часть его синтаксиса заимствована из C , Java и Perl . А также добавлена пара уникальных характерных только для PHP функций . Основная цель этого языка — создание динамически генерируемых PHP HTML страниц .

PHP в HTML

При создании сложных веб-страниц вы столкнетесь с необходимостью объединить PHP и HTML для реализации конкретных задач. На первый взгляд это может показаться сложным, так как PHP и HTML являются двумя независимыми дисциплинами, но это не так. PHP предназначен для взаимодействия с HTML , и его код может быть включен в разметку страницы.

В HTML-страницы PHP-код включается с помощью специальных тегов. Когда пользователь открывает страницу, сервер обрабатывает PHP-код , а затем отправляет результат обработки ( не сам PHP-код ) в браузер.

HTML и PHP довольно просто объединить. Любая часть PHP-скрипта за пределами тегов игнорируется PHP-компилятором и передается непосредственно в браузер. Если посмотреть на пример, приведенный ниже, то можно увидеть, что полный PHP-скрипт может выглядеть следующим образом:

Приведенный выше код — это обычный HTML с небольшим фрагментом PHP , который выводит текущую дату, используя встроенную функцию date . При этом весь HTML будет игнорироваться PHP-компилятором и передаваться в браузер без изменений.

Интегрировать PHP в HTML действительно очень легко. Помните, что скрипт — это HTML-страница с включением определенного PHP кода . Можно создать скрипт, который будет содержать только HTML (без тегов ), и он будет нормально работать.

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How to Use PHP in HTML

Sajal Soni Last updated Mar 26, 2022

In this article, I’ll show you how to use PHP code in your HTML pages. It’s aimed at PHP beginners who are trying to strengthen their grip on the world’s most popular server-side scripting language.

Again, PHP is a server-side scripting language. That means a PHP script is executed on the server, the output is built on the server, and the result is sent as HTML to the client browser for rendering. It’s natural to mix PHP and HTML in a script, but as a beginner, it’s tricky to know how to combine the PHP code with the HTML code.

What’s in this article:

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Today, we’re going to discuss a couple of different ways you could choose from when you want to use PHP in HTML. I assume that you have a working installation of PHP so that you can run the examples provided in this article.

Different Ways to Combine PHP and HTML

Broadly speaking, when it comes to using PHP in HTML, there are two different approaches. The first is to embed the PHP code in your HTML file itself with the .html extension—this requires a special consideration, which we’ll discuss in a moment. The other option, the preferred way, is to combine PHP and HTML tags in .php files.

Since PHP is a server-side scripting language, the code is interpreted and run on the server side. For example, if you add the following code in your index.html file, it won’t run out of the box.

First of all, don’t worry if you haven’t seen this kind of mixed PHP and HTML code before, as we’ll discuss it in detail throughout this article. The above example outputs the following in your browser:

So as you can see, by default, PHP tags in your .html document are not detected, and they’re just considered plain text, outputting without parsing. That’s because the server is usually configured to run PHP only for files with the .php extension.

If you want to run your HTML files as PHP, you can tell the server to run your .html files as PHP files, but it’s a much better idea to put your mixed PHP and HTML code into a file with the .php extension.

That’s what I’ll show you in this tutorial.

How to Add PHP Tags in Your HTML Page

When it comes to integrating PHP code with HTML content, you need to enclose the PHP code with the PHP start tag . The code wrapped between these two tags is considered to be PHP code, and thus it’ll be executed on the server side before the requested file is sent to the client browser.

Let’s have a look at a very simple example, which displays a message using PHP code. Create the index.php file with the following contents under your document root.

 How to put PHP in HTML - Simple Example 

  echo "This message is from server side." ?>  

The important thing in the above example is that the PHP code is wrapped by the PHP tags.

The output of the above example looks like this:

And, if you look at the page source, it should look like this:

As you can see, the PHP code is parsed and executed on the server side, and it’s merged with HTML before the page is sent to the client browser.

Let’s have a look at another example:

 How to put PHP in HTML- Date Example 

 This is pure HTML message. 

 Next, we’ll display today’s date and day by PHP! 

Today’s date is  echo date('Y/m/d') ?>  and it’s a  echo date(‘l’) ?>  today!

 Again, this is static HTML content. 

This will output the current date and time, so you can use PHP code between the HTML tags to produce dynamic output from the server. It’s important to remember that whenever the page is executed on the server side, all the code between the tags will be interpreted as PHP, and the output will be embedded with the HTML tags.

In fact, there’s another way you could write the above example, as shown in the following snippet.

 How to put PHP in HTML- Date Example 

 This is pure HTML message. 

 Next, we’ll display today’s date and day by PHP! 

echo 'Today’s date is ' . date('Y/m/d') . ' and it’s a '.date('l').' today!'; 

 Again, this is static HTML content. 

In the above example, we’ve used the concatenation feature of PHP, which allows you to join different strings into one string. And finally, we’ve used the echo construct to display the concatenated string.

The output is the same irrespective of the method you use, as shown in the following screenshot.

And that brings us to another question: which is the best way? Should you use the concatenation feature or insert separate PHP tags between the HTML tags? I would say it really depends—there’s no strict rule that forces you to use one of these methods. Personally, I feel that the placeholder method is more readable compared to the concatenation method.

The overall structure of the PHP page combined with HTML and PHP code should look like this:

In the next section, we’ll see how you could use PHP loops with HTML.

How to Use PHP Loops in Your HTML Page

Iterating through the arrays to produce HTML content is one of the most common tasks you’ll encounter while writing PHP scripts. In this section, we’ll see how you could iterate through an array of items and generate output.

In most cases, you’ll need to display array content which you’ve populated from the database or some other sources. In this example, for the sake of simplicity, we’ll initialize the array with different values at the beginning of the script itself.

Go ahead and create a PHP file with the following contents.

 How to put PHP in HTML - foreach Example 

$employees = array(‘John’, ‘Michelle’, ‘Mari’, ‘Luke’, ‘Nellie’); 

 foreach ($employees as $employee)  ?> 

Firstly, we’ve initialized the array at the beginning of our script. Next, we’ve used the foreach construct to iterate through the array values. And finally, we’ve used the echo construct to display the array element value.

And the output should look like this:

The same example with a while loop looks like this:

 How to put PHP in HTML - foreach Example 

$employees = array(‘John’, ‘Michelle’, ‘Mari’, ‘Luke’, ‘Nellie’); 

And the output will be the same. So that’s how you can use foreach and while loops to generate HTML content based on PHP arrays.

In the next section, we’ll see how you could use PHP short tag syntax.

How to Use PHP Short Tags

Let’s revise the example with the short-hand syntax which we discussed earlier.

 How to put PHP in HTML - Simple Example 

  "This message is from server side." ?>  

As you can see, we can omit the echo or print construct while displaying a value by using the shorthand syntax. The shorthand syntax is short and readable when you want to display something with echo or print .

So these are different ways you can use to add PHP in HTML content. As a beginner, you can learn from trying different ways to do things, and it’s fun too!

Including Code from Different Files

There are a lot of situations where you need to use the same code on multiple pages of a website. One such example would be the header and footer section of a website. These sections usually contain the same HTML throughout the website.

Think of this like moving the common CSS rules of a website into a stylesheet instead of placing them inside the style tags on individual pages.

There are four functions available in PHP to help you include other files within a PHP file. These are include() , include_once() , require() , and require_once() .

The include() function will include and evaluate the specified file and give you a warning if it cannot find the file. The require() function does the same thing, but it gives you an error instead of a warning if the file cannot be found.

When working on big projects, you might unintentionally include the same file multiple times. This could cause problems like function redefinition. One way to avoid these issues is to use the include_once() and require_once() functions in PHP.

Let’s use code from a previous section to show you how to use these functions. I will be using include() in this example. Create a file called header.php and place the following code inside it.

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Execute PHP From an HTML File

Angela Bradley is a web designer and programming expert with over 15 years of experience. An expert in iOS software design and development, she specializes in building technical hybrid platforms.

PHP is a server-side programming language that is used in conjunction with HTML to enhance the features of a website. It can be used to add a log-in screen or a survey, redirect visitors, create a calendar, send and receive cookies, and more. If your website is already published on the web, you’ll need to alter it a bit to use the PHP code with the page.

When a webpage is accessed, the server checks the extension to know how to handle the page. Generally speaking, if it sees a .htm or .html file, it sends it right to the browser because it doesn’t have anything to process on the server. If it sees a .php extension, it knows that it needs to execute the appropriate code before passing it along to the browser.

Process

You find the perfect script, and you want to run it on your website, but you need to include PHP on your page for it to work. You could just rename your pages to yourpage.php instead of yourpage.html, but you may already have incoming links or search engine ranking, so you don’t want to change the file name. What can you do?

If you are creating a new file anyway, you may as well use .php, but the way to execute PHP on a .html page is to modify the .htaccess file. This file may be hidden, so depending upon your FTP program, you may have to modify some settings to see it. Then you just need to add this line for .html:

AddType application/x-httpd-php .html
 

AddType application/x-httpd-php .htm
 

If you only plan on including the PHP on one page, it is better to set it up this way:

 AddType application/x-httpd-php .html 
 

This code makes the PHP executable only on the yourpage.html file and not on all of your HTML pages.

Pitfalls

• If you have an existing .htaccess file, add the supplied code to it, do not overwrite it or other settings may stop working. Always be cautious when working on your .htaccess file and ask your host if you need help.
• Anything in your .html files that starts with ‘; ?>

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