HTML stands for the standard language for hypertext markup of docs that make up Web resources. Files in HTML have the same name extension.

HTM stands for the file name extension exploited for HTML files.

How to Open HTML, HTM and PHP Files
How to Open HTML, HTM and PHP Files

HTML and HTM differ in the only superfluous letter of the file name extension. More common is HTML, but nothing prevents you from cutting at your discretion. The extension comes from the full name – HyperText Markup Language. The last word is omitted, and HTM is obtained. Previously, this was made by the requirement to limit the number of letters in the file name extension: the old operating systems understood only three.

Today there are no special prerequisites, so the reduction may be due only to the human factor: maybe, the laziness of the author, maybe, a habit, maybe, a desire to level the columns of the list of files. In any case, the presence or absence of one letter does not change anything.

However, when working in older systems and programs, you will have to use HTM for them – you will still be circumcised.

Any browser will open and correctly display HTM and HTML files.

HTML Files
HTML Files

There are a lot of programs developed to edit and create HTM/HTML files. These are editors like Eclipse, Komodo Edit, and Bluefish. You can find them on Wiki Ext – The File Extensions Encyclopedia.

One more popular editor with a lot of additional features is Adobe Dreamweaver, however, it’s not available for free.

You can also exploit a text editor to make changes to an HTM or an HTML file. Notepad++ is probably the best option. Notepad, which is part of the Windows operating system, also works with HTML files. But it was designed to solve other problems. Therefore, before you open the HTML file, it’s recommended to get used to its features.

The structure of HTM files is constructed in a special way and has a very specific syntax. This is done so that the code and text inside it are displayed properly when opened in the browser.

Therefore, converting an HTM or HTML file to another format will result in the loss of the web page. But if you desire to convert an HTM or an HTML file into a different format for a more convenient viewing, for example, in a picture or PDF file, then this is done very easily.

To convert a web page to PDF in the Google Chrome browser, select “Save as PDF” from the “Print” menu.

Also, for the Google Chrome browser, there’s the Full Page Screen Capture extension. It can convert the file opened in the browser to PNG format. Other browsers also have similar tools and extensions.

In addition, you can use special services designed for converting HTM/HTML files, such as iWeb2Shot, Convert Web Page, or Web-capture.

HTM Files
HTM Files

Note: It is important to understand that you can’t convert an HTM/HTML file into any format other than text.

HTM vs HTML: What’s the difference?

To know how to open an HTML file on a computer, you should first understand the differences between the two formats of web pages.

In addition to the letter “L”, of course. Short answer: there is no difference. Long answer: there is no difference, but be careful with this or that extension.

Previously, in the time of MS-DOS, file extensions were limited to three letters. In a relatively short period of time, when the world was dominated by HTM, and HTML didn’t exist.

Today, fully acceptable are web pages that end in both HTM and HTML.

The server hosting the web page may require the use of a specific HTML file extension. For example, index.html or index.htm. If you aren’t sure which extension to use, contact your hosting provider.

How to open a PHP file

PHP is the scripting language most commonly used by web developers to represent dynamic content that changes based on the parameters specified in the PHP code. For example, you can change the background image depending on the time of day or follow the publication at any stage of its creation. PHP files can be opened in Mac OS X and in Windows using the code editor. You can also run the PHP file on the server you are using, or on your computer using XAMPP. This article provides several ways to open PHP files.

Download the code editor (if you don’t have one). The code editor is a text editor where you can enter and edit programs in various programming languages. Keep in mind that the code editor is different from a standard text editor, such as Microsoft Word.

The code editor supports working with different programming languages, including PHP.

Common code editors are Dreamweaver, Notepad++, TextEdit and Komodo Edit.

Install the code editor. When you find the appropriate code editor, download and install it (follow the on-screen instructions).

By downloading the installation file, you can select the option of automatic installation. In the window that opens, click “Run” to automatically launch the installation file after it is downloaded.

PHP Files
PHP Files

After the code editor is installed, you can open and view PHP files.

Right-click on the PHP file and choose “Open with” from the menu. Then select the installed code editor. The file will open in the code editor after a while, the time depends on the performance of the computer.

If there is no code in the opened menu of the installed editor, click “Select program“. If the code editor doesn’t appear in the window that opens, click “Browse” and find the file that the code editor starts (perhaps, that file is on the desktop). Highlight the file and click OK.

After you click “OK”, the PHP file opens in the code editor. Now you can view and edit the code.

Make the code editor the default program. In order to make it easier for you to open PHP-files later, set the code editor as the program in which the corresponding files will be opened. This can be done in the “Default” window.

Click Settings – PC Settings – Search and Applications – Default.

Click “Select standard applications for file types” or “Select standard applications for protocols“. Then click on the code editor, for example, on Notepad++, to install it as the default program.

Now, to open any PHP file in the code editor, just double-click on the file.

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