PHP Tools transparently integrate into Microsoft Visual Studio, and extend it with the support for PHP language. The extension is focused on developer productivity respecting conventions. It understands your code, provides smart code completion, quick navigation, syntax error checking, integrated PHP manual, project system, debugging support and more. PHP Tools for Visual Studio brings seamless analysis of source code within PHP projects. In addition to IntelliSense improvements, this feature gives you smart code validation which underlines unused variables, type mismatches, dead code and other suspicious constructs in your code.