PECL (pronounced 'pickle') is a separate project that distributes PHP extensions (compiled code written in C, such as the PDO extension). PECL extensions are also distributed as packages and can be installed using the PEAR installer with the pecl command. More information and all PECL packages can be found at PECL homepage. Install the PECL package. If you are using WAMP, like me, make sure to use the Thread Save version. Pick the package that matches your PHP version and the X86/X64 version of ImageMagick you've installed. From the download, in my case phpimagick-3.1.2-5.5-nts-vc11-x86.zip, grab the phpimagick.dll file, and move it your PHP extention folder. Pecl install mailparse But, in a system where running pecl command does not recognize the same, how to install PECL first on a Fedora 7 system (old system). The PECL installer downloads the source code of the extension and tries to compile it with your local C compiler. The problem is that the whole process is designed for Unix systems, where a C compiler is available or can be easily installed. Setting an environment to compile C code under Windows is pretty complicate.