PHP is a server scripting language, and a powerful tool for making dynamic and interactive Web pages. PHP is a widely-used, free, and efficient. PHP is a widely-used general-purpose scripting language that is especially suited for web development and can be embedded into HTML.
It's an open source, server-side, scripting language used for the development of web applications. PHP is readily available and is entirely free. In contrast to other scripting languages used for web development which requires the user to pay for the support files, PHP is open to everyone, anytime and anywhere. PHP is best for small and medium level enterprise and less costly.