PHP is a free, open source server side scripting language that is used to design the web sites or web based software applications. We can create dynamic content that interact with database. It is used to manage dynamic content, database, accessing cookies, session tracking, e-commerce websites.
Unlike other scripting languages like HTML and pearl, PHP scripts are executed on server and the final output is deployed on the web browser in HTML format. PHP files have file extensions like “.php”, “.php3″.
PHP scripting language is used in web development. The additional feature of PHP is that it can be mixed into HTML tags. PHP supports many databases such as MySQL, Oracle, PostgreSQL, Sybase, etc., thus making it very strong and effective. It is also compatible with many servers such as Apache, IIS, etc. Thus it makes most widely used server side scripting language among the other.