PHP is a server side scripting language used in web development to cerate dynamic web pages and can be embedded into HTML codes .The web server with php processor module interprets the code and geneate the web pages as per the given code .
PHP is a loosely typed language. It means you do not have to tell PHP which data type the variable is.PHP automatically converts the variable to the correct data type, depending on its value.
PHP stands for PHP Hypertext Preprocessor (A recursive acronym) .Earlier it was known as personnel home pages .
PHP is an open source software and its free to download and use .
It supports many databases like MySql,Oracle etc…