How to Use PHP in HTML

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In this article, I’ll show you how to use PHP code in your HTML pages. It’s aimed to 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 finally 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.

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 use 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.



  
    Embed PHP in a .html File

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 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 and the PHP end 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 by the PHP code. Create the index.php file with the following contents under your document root.



  
    How to put PHP in HTML - Simple Example

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:

Example Output

And, if you look at the view source of the page, 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  and it’s a  today!
    


Again, this is static HTML content.

This will output the current date and time, so as you can see you can use PHP code in 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 and ?> 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!

    

        ' . 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 same irrespective of the method you use as shown in the following screenshot.

And that brings another question: which is the best way? Should you use the concatenation feature or insert separate PHP tags in between the HTML tags? I would say, it really depends, there’s no strict rule which 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:



  
    ...
  
  
  
    HTML...
    
    HTML...
    
    HTML...
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 the an array of items and and generate output.

In most of the 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 in 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
  
  
    
    
List of Employees

    
    
    
        
    •

Firstly, we’ve initialized the array in 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
  
  
    
    
List of Employees

    
    

    
        
    •

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 and last section, we’ll see how you could use PHP short tags syntax.

How to Use PHP Short Tags

In the examples we’ve discussed so far, we’ve used the as a starting tag everywhere. In fact, PHP comes with a variation of that which you could use as a short-hand syntax when you want to display a string or value of the variable.

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



  
    How to put PHP in HTML - Simple Example

As you can see, we can omit the echo or print construct while displaying a value by using the short-hand syntax. The short-hand 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!

Conclusion

Today we discussed how you can mix PHP and HTML to create dynamic HTML. We discussed different methods with a few handful of examples to see how things work.

Feel free to use the feed below to ask if you’ve any queries and I’ll be happy to answer them!

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