How to Run a PHP File

Today, we’re going to discuss how you can run PHP files. If you're new to PHP programming, this article will help you learn how to run PHP scripts.

PHP is a server side scripting language which is mostly used to build web based applications. These may range from a very simple blog website to a full-fledged eCommerce website. In fact, PHP is one of the most popular server-side scripting languages for web development.

If you’re a beginner in PHP programming and you don’t know what a PHP file is, I would recommend you to review the basics of a PHP file. 

• 
  PHP
  What Is a PHP File?
  Sajal Soni

In this post, we’ll discuss different ways to run PHP files.

Different Ways to Run PHP Files

There are two ways to run PHP files. The preferred way of running PHP files is within a web server like Apache, Nginx, or IIS—this allows you to run PHP scripts from your browser. That’s how all PHP websites work! The other way is to run PHP scripts command line, and it doesn't require you to set up a web server.

Of course, if you want to publish your PHP pages online, you’ll have to go with the web server set up. On the other hand, running PHP scripts from the command line is useful to perform routine tasks. These are generally configured to run in the background as jobs and are run by the php command without a web server. In fact, many PHP scripts or applications nowadays come with built-in commands that are used to perform various operations like install software, export and import database entities, clear the cache and more. You may have heard of Composer—it's a dependency manager for PHP and is  one of the most popular tools built for command line PHP.

Run a PHP File on a Web Server

If you want to run PHP scripts from a web server, you need to configure it with one of the web servers which supports it. For Windows, the IIS web server is one of the most popular among the others. On the other hand, Apache and Nginx are widely used web servers for the rest of the operating systems.

The good news is that most hosting providers will have a web server with PHP already set up for you when you log in to your new server.

Run a PHP File in the Browser for Development With XAMPP

If you want to run a PHP file in the browser on your own computer, you'll need to set up a PHP development stack.  You’ll need at least PHP, MySQL, and a server like Apache or Nginx. MySQL is used to setup databases your PHP applications can work with. Of course, you can choose to work with other database engines, but MySQL is one of the most popular databases used along with PHP.

Instead of downloading all this software separately and configuring it to work together, I  recommend you just download and install a program like XAMPP. It will include all the necessary software and will get you set up to run PHP in no time. And yes, it supports Windows, Linux and OS X.

XAMPP which contains everything which is necessary to build your web pages locally. It's hassle free and allows you to start PHP development right away.

For this tutorial, I'll use the XAMPP software to demonstrate PHP examples. So download and install it if you want to follow along and run the PHP examples. If you face any problems during installation, feel free to post your queries using the feed at the end of this article.

Once you've installed the XAMPP software locally and have it running successfully, you should be able to see the default XAMPP page at http://localhost in your browser.

Run Your PHP File in XAMPP

The first thing which you will need to know after installing XAMPP is the location where you will put your PHP files. When you install the XAMPP software, it creates the htdocs directory, this is the document root of your default web server domain: localhost. So if you go to http://localhost/example.php, the server will try to find the example.php file under the htdocs directory.

Depending on the OS you’re using, the location of the htdocs directory varies. For Windows, it would be located at C:\xampp\htdocs. On the other hand, it would be located at /opt/lampp/htdocs for Linux users. Once you’ve found the location of the htdocs directory, you can start creating PHP files right away and running them in your browser!

phpinfo() is a very useful function that gives you information about your server and PHP setup. Let’s create a phpinfo.php file under the htdocs directory with the following contents:

<?php
phpinfo();
?>

Now, go ahead and run it in your browser at http://localhost/phpinfo.php, and you should see output like this:

If you haven’t realized yet, let me tell you that you have just run your first PHP file on the web server! It may be a small one but a significant step towards learning PHP website development.

In fact, you could also create new directories under the htdocs directory to organize your PHP scripts. For example, you could create the datetime directory under htdocs for examples related to date and time. So if you create a today_date.php file under the htdocs/datetime directory, you could access it in the browser like http://localhost/datetime/today_date.php.

So in this way, you could create and run PHP scripts with a web server. In fact, this is what you are going to use most of the time in your day-to-day PHP development. 

In the next section, we’ll see how you could run PHP scripts using command line.

How to Run a PHP File Using Command Line

When it comes to running PHP scripts on command line, you should be aware of location of the PHP executable file in your PHP installation.

For Windows users, you should be able to find the php.exe file under the directory where you have installed your PHP.  On the other hand, if you're a Linux or OS X user, you should be able to find it at /usr/bin/php. In fact, on Linux or OS X, you can just use the shortcut php from any directory. Once you know location of your PHP executable file, you just need to provide the name of the PHP file which you want to execute from the command line interface.

As a Windows user though, you'll need to type the full path the the PHP executable to run a PHP script. The PHP executable is usually available at C:\php7\php.exe, so can use it to execute the PHP file as shown in the following command.

C:\php7\php.exe my_example.php

For Linux, you don't need to type the whole path to the PHP executable.

php my_example.php

As we discussed earlier, command line PHP scripts are generally used for routine application specific tasks like:

• clear or generate application caches
• export/import system entities
• batch processing
• other general purpose tasks

Generally, these kinds of tasks take a long time to execute and are not suited to running in a web environment since they cause timeout errors.

It’s important to note that when you’re running PHP scripts on command line, you won’t have access to any $_SERVER variables, since these are only initiated if you’re running PHP within a web server. Thus, it’s not recommended to rely on these variables if you’re planning to run your scripts using the command line.

As a PHP programmer, it is important to understand how the command line PHP interface works. In fact, a lot of PHP software and frameworks nowadays come with a built-in command line tool which allows you to perform a wide range of utility tasks from CLI itself. 

Conclusion

Today, we discussed how you could run PHP files on your system. Specifically, we went into the details of how to execute PHP scripts in a browser along with a web server and how to run it with command line interface as well.

As a beginner, it’s important for you to understand the basic concepts in the first place. And I hope this article has helped you to move a step further in your PHP leanings. Don’t hesitate to ask if you’re any queries by using the feed below.

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