I'm trying to get this setup working. Here is what I've done.
Copied the DLL From php_imagick-3.1.2-5.5-nts-vc11-x86.zip
to the php ext directory. Downloaded from here http://windows.php.net/downloads/pecl/releases/imagick/3.1.2/
Added this line(s) to the php.ini
Did an IIS reset. Try to access it via a test script, and I get Class 'Imagick' not found, and it isn't showing up in phpinfo.
From other web searchs it looks like most struggle with getting the php, program, and dll versions matched up but I think I've done that. PHP is 5.5 VC11 x86. I installed the latest x86 version of the program, and installed the 5.5 NTS x86 VC11 version of the DLL. I'm at a loss.