This site is dedicated to supporting PHP on Microsoft Windows. It also supports ports of PHP extensions or features as well as providing special builds for the various Windows architectures.
If you like to build your own PHP binaries, instructions can be found on the Wiki.
If you are using PHP with IIS you should use the Non-Thread Safe (NTS) versions of PHP.
If you are using PHP with Apache 1 or Apache2 from apache.org (not recommended) you need to use the older VC6 versions of PHP compiled with the legacy Visual Studio 6 compiler. Do NOT use VC9+ versions of PHP with the apache.org binaries.
More recent versions of PHP are built with VC9 or VC11 (Visual Studio 2008 and 2012 compiler respectively) and include improvements in performance and stability.
The VC11 builds require to have the Visual C++ Redistributable for Visual Studio 2012 x86 or x64 installed.
Profile Guided Optimization is an optimization feature available in Microsoft's Visual C++ compiler that allows you to optimize an output file based on profiling data collected during test runs of the application or module.
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