PHP is an acronym stand for Hypertext PreProcessor. It is an open source scripting language which is used for web development and can be embedded in HTML. PHP is free, efficient, and that's why it is very popular in web development scenario.
PHP coding is enclosed within <?php ?> tag. The page originates as PHP code on the server but is transformed into HTML code before sending along to the PHP code and converts it into HTML code.
If you want to learn PHP ,I am glad to share with some good books and some good site:
- PHP: Hypertext Preprocessor.
- The site :Free php script
The book I recommendedHP and MySQL for Dynamic Web Sites: Visual QuickPro Guide (2nd Edition)
by Larry Ullman