How to Make an Html Read Php
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In this article, I'll evidence 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'south 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 effect is sent as HTML to the customer browser for rendering. It'southward natural to mix PHP and HTML in a script, but as a beginner, it's catchy to know how to combine the PHP lawmaking with the HTML code.
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Today, nosotros're going to talk over a couple of different ways you could choose from when you lot want to utilise 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 unlike 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 hash out in a moment. The other option, the preferred fashion, is to combine PHP and HTML tags in.php files.
Since PHP is a server-side scripting linguistic communication, the code is interpreted and run on the server side. For case, if you add the post-obit code in yourindex.html file, it won't run out of the box.
<!DOCTYPE html> <html> <caput> <title>Embed PHP in a .html File</title> </caput> <body> <h1><?php echo "Hello World" ?></h1> </body> </html>
Starting time of all, don't worry if you lot haven't seen this kind of mixed PHP and HTML code before, as nosotros'll discuss it in detail throughout this article. The above example outputs the following in your browser:
<?php echo "How-do-you-do World" ?>
Then as you can come across, by default, PHP tags in your.html certificate are non detected, and they're just considered plainly text, outputting without parsing. That'south 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 tin tell the server to run your.html files as PHP files, merely it'due south a much better thought to put your mixed PHP and HTML lawmaking into a file with the.php extension.
That'southward what I'll bear witness y'all in this tutorial.
How to Add PHP Tags in Your HTML Folio
When information technology comes to integrating PHP lawmaking with HTML content, y'all demand to enclose the PHP code with the PHP outset tag<?php and the PHP finish tag?>. The code wrapped between these two tags is considered to be PHP lawmaking, and thus it'll exist executed on the server side before the requested file is sent to the client browser.
Allow's have a look at a very uncomplicated example, which displays a message using PHP code. Create theindex.php file with the following contents under your document root.
<!DOCTYPE html> <html> <head> <championship>How to put PHP in HTML - Unproblematic Case</title> </caput> <torso> <h1><?php repeat "This message is from server side." ?></h1> </trunk> </html>
The of import thing in the above case is that the PHP code is wrapped by the PHP tags.
The output of the above case looks like this:
And, if you wait at the page source, information technology should look like this:
Every bit you can see, the PHP code is parsed and executed on the server side, and information technology'south merged with HTML before the page is sent to the customer browser.
Let'southward have a expect at some other example:
<!DOCTYPE html> <html> <head> <title>How to put PHP in HTML- Date Example</title> </caput> <body> <div>This is pure HTML message.</div> <div>Next, nosotros'll brandish today's engagement and day past PHP!</div> <div> Today's appointment is <b><?php echo engagement('Y/m/d') ?></b> and it'southward a <b><?php echo date('50') ?></b> today! </div> <div>Again, this is static HTML content.</div> </body> </html> This volition 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 call back that whenever the folio is executed on the server side, all the lawmaking between the<?php and?> tags will exist interpreted as PHP, and the output will be embedded with the HTML tags.
In fact, at that place's another style you could write the to a higher place example, as shown in the following snippet.
<!DOCTYPE html> <html> <head> <championship>How to put PHP in HTML- Date Example</title> </head> <torso> <div>This is pure HTML message.</div> <div>Next, nosotros'll brandish today's date and 24-hour interval by PHP!</div> <div> <?php repeat 'Today'southward engagement is <b>' . appointment('Y/m/d') . '</b> and it's a <b>'.date('fifty').'</b> today!'; ?> </div> <div>Again, this is static HTML content.</div> </body> </html> In the to a higher place case, we've used the concatenation feature of PHP, which allows you to join different strings into one cord. And finally, we've used theecho construct to display the concatenated cord.
The output is the same irrespective of the method you lot utilise, as shown in the post-obit screenshot.
And that brings us to another question: which is the best way? Should you use the chain feature or insert divide PHP tags between the HTML tags? I would say information technology really depends—at that place'south no strict rule that forces you lot to use ane of these methods. Personally, I experience 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:
<!DOCTYPE html> <html> <head> <title>...</title> </caput> <body> HTML... <?php PHP lawmaking ... ?> HTML... <?php PHP code ... ?> HTML... </body> </html>
In the next section, nosotros'll see how you could utilise 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 meet while writing PHP scripts. In this section, we'll run into how you could iterate through an array of items and generate output.
In most cases, you'll need to brandish array content which y'all've populated from the database or another sources. In this example, for the sake of simplicity, nosotros'll initialize the assortment with different values at the beginning of the script itself.
Become alee and create a PHP file with the following contents.
<!DOCTYPE html> <html> <caput> <title>How to put PHP in HTML - foreach Example</title> </head> <trunk> <?php $employees = array('John', 'Michelle', 'Mari', 'Luke', 'Nellie'); ?> <h1>List of Employees</h1> <ul> <?php foreach ($employees as $employee) { ?> <li><?php echo $employee ?></li> <?php } ?> </ul> </trunk> </html> Firstly, we've initialized the array at the beginning of our script. Adjacent, we've used theforeach construct to iterate through the array values. And finally, we've used theecho construct to display the array element value.
And the output should wait like this:
The same example with awhile loop looks like this:
<!DOCTYPE html> <html> <head> <title>How to put PHP in HTML - foreach Example</title> </head> <trunk> <?php $employees = array('John', 'Michelle', 'Mari', 'Luke', 'Nellie'); $total = count($employees); ?> <h1>List of Employees</h1> <ul> <?php $i = 0; ?> <?php while ($i < $total) { ?> <li><?php echo $employees[$i] ?></li> <?php ++$i ?> <?php } ?> </ul> </body> </html> And the output will exist the same. So that'due south how yous can utilizeforeach andwhile loops to generate HTML content based on PHP arrays.
In the next section, we'll see how you could apply PHP curt tag syntax.
How to Use PHP Brusk Tags
In the examples we've discussed and then far, nosotros've used the<?php as a starting tag everywhere. In fact, PHP comes with a variation,<?=, which y'all could utilise equally a short-mitt syntax when yous want to display a cord or value of the variable.
Let'southward revise the example with the short-manus syntax which nosotros discussed earlier.
<!DOCTYPE html> <html> <caput> <title>How to put PHP in HTML - Simple Example</title> </head> <body> <h1><?= "This message is from server side." ?></h1> </torso> </html>
As you tin encounter, we tin can omit theecho orprint construct while displaying a value by using the autograph syntax. The autograph syntax is brusk and readable when you want to display something withecho orprint.
So these are dissimilar means you can use to add together PHP in HTML content. As a beginner, you can learn from trying dissimilar ways to do things, and information technology'due south fun too!
Including Code from Different Files
At that place are a lot of situations where you need to apply the same code on multiple pages of a website. One such example would be the header and footer department of a website. These sections usually contain the same HTML throughout the website.
Think of this similar moving the common CSS rules of a website into a stylesheet instead of placing them inside thestyle tags on individual pages.
There are four functions available in PHP to assistance you include other files inside a PHP file. These areinclude(),include_once(),require(), andrequire_once().
The include() function will include and evaluate the specified file and give y'all a warning if it cannot discover the file. Therequire() function does the same thing, but information technology gives you an mistake instead of a alert if the file cannot exist plant.
When working on big projects, you might unintentionally include the same file multiple times. This could cause problems like function redefinition. One fashion to avoid these issues is to use theinclude_once() andrequire_once() functions in PHP.
Let's use lawmaking from a previous department to show you how to apply these functions. I volition be usinginclude() in this case. Create a file calledheader.php and place the post-obit code within it.
<!DOCTYPE html> <html> <head> <title>How to put PHP in HTML</title> </head> <body> <div>This is pure HTML message.</div> <div>Next, we'll brandish today's date and day using PHP!</div>
Create another file calleddate.php and place the following lawmaking in information technology.
<?php include('header.php'); ?> <div> <?php echo 'Today'south date is <b>' . date('Y/one thousand/d') . '</b>!'; ?> </div> </trunk> </html> Create 1 more file calledday.php and place the post-obit code in information technology.
<?php include('header.php'); ?> <div> <?php echo 'Today is <b>'.appointment('l').'</b>!'; ?> </div> </trunk> </html> Notice that we have included the path toheader.php at the pinnacle of bothday.php anddate.php. Make sure that the three files are in the same directory. Opening upappointment.php in the browser should now show you the following output.
Opening upday.php should show you the following output.
As you tin can see, the code we put withinheader.php was included in both our files. This makes web development much easier when yous are working with a lot of files. Just brand the changes in i place, and they will be reflected everywhere.
Conclusion
Today, nosotros discussed how you can mix PHP and HTML to create dynamic HTML. We discussed different methods, with a scattering of examples to run across how things work.
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