PHP started in 1995 as a simple scripting language to build dynamic websites and has since evolved into the most popular language for building websites and web applications. It is easy to learn yet powerful, allowing developers to upload files, make websites searchable, and more. While not difficult, becoming an expert in PHP requires exploring its many built-in functions and tools to develop your own solutions. PHP is safe when handled properly, like kitchen knives, but can cause damage if misused. Developers must understand basic security principles and ensure they comprehend any code used.