PHP Hypertext Preprocessor (PHP) is a programming language that allows web developers to create dynamic content that interacts with databases. Developed by The PHP Group
License: Open Source
PHP is primarily designed for web development and has a rich ecosystem and community support, making it ideal for dynamic web applications. Tcl, on the other hand, is a versatile scripting language that excels in automation, rapid prototyping, and GUI applications, but lacks the popularity and resources of PHP.