The php -m command is a quick and simple way to list all installed PHP extensions on a Linux machine. This method also proves useful when we need to check which PHP extensions are currently loaded.

What Is a PHP File? A file with the PHP file extension is a PHP source code file that contains Hypertext Preprocessor code. They are often used as web page files that generate HTML from a PHP engine running on a web server. The HTML content that the PHP engine creates from the code is what's seen in the web browser.

Step 1: Click on the Config button then select the php. ini file for your PHP installation, and open it in a text editor. Step 2: Locate the line that specifies the location of the “extension = ” line. Step 3: Look for the extension you want to install and remove the semicolon preceding that line.

PHP stands for Hypertext Preprocessor. It is an open-source server-side scripting language used for dynamic web development and can be embedded into HTML codes.