PHP is a server-side scripting language commonly used for web development. It allows embedding scripts into HTML files which are then executed on the server to produce dynamic web page content. PHP scripts can connect to and manipulate databases like MySQL. PHP files have a .php extension and contain text, HTML tags, and PHP scripts. Basic PHP syntax includes using <?php ?> tags to embed PHP code and declare variables starting with $ to store values. Common string functions include concatenation, strlen() to get string length, and strpos() to find a substring position.

1. What is PHP?PHP stands for PHP: Hypertext Preprocessor

2. PHP is a server-side scripting language, like ASP

3. PHP scripts are executed on the server

4. PHP supports many databases (MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.)

5. PHP is an open source software

6. PHP is free to download and useWhat is a PHP File?PHP files can contain text, HTML tags and scripts

7. PHP files are returned to the browser as plain HTML

8. PHP files have a file extension of ".php", ".php3", or ".phtml"What is MySQL?MySQL is a database server

9. MySQL is ideal for both small and large applications

10. MySQL supports standard SQL

11. MySQL compiles on a number of platforms

12. MySQL is free to download and useWhy PHP?PHP runs on different platforms (Windows, Linux, Unix, etc.)

13. PHP is compatible with almost all servers used today (Apache, IIS, etc.)

14. PHP is FREEWARE.