PHP is stands for HYPERTEXT PREPROCESSOR, and it's a server scripting language which is used for creating dynamic and interactive Web pages.

Php becoming most popular language and since PHP is so popular/ widely used. Why php is so popular in today's, let's see some of the benefits of PHP:

1 - PHP is open source and it has large support community.

2 - You can use any text editor in order to code PHP. PHP also isn’t OS specific, you can run it on Linux , Mac OSX , Windows , UNIX.

3 - FREE, There are no costs associated with using PHP, including updates.

4 - PHP also support Open Oriented Concept.

5 - PHP does not use a lot of a system’s resources so, it is fast. 

Sample Code of PHP

<!DOCTYPE html>
    echo "hello world";