Definition: The term "PHP" stands for PHP, a programming language originally created by Guido van Rossum in 1995. It's an open-source scripting language based on XML syntax. Its purpose is to provide server-side applications with dynamic, interactive web pages and forms. It was the first widely-used platform for writing real-time Web applications, and it remains popular among developers who use PHP in their projects.
PHP4 stands for PHP 5, released in January 2016. It includes all of the features introduced in PHP 5 while maintaining compatibility with older versions. Its syntax has evolved significantly over time, becoming more streamlined and easier to work with compared to previous PHP versions.
PHP4 is a fork of PHP3 that adds support for XML documents, as well as integration with various frameworks like Laravel, Symfony, and CodeIgniter. This update enhances the language's flexibility and provides developers with new features they might not have access to in older versions of PHP.
The definition of "php4" can vary depending on context but generally refers to a version of PHP that has been released after 2016, though it includes some core features of PHP3 from 2010. This is the latest major release of PHP and comes with significant enhancements like support for XML documents and integration with more modern frameworks.
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