PEAR (short for PHP Extension and Application Repository) is a framework and distribution system for reusable PHP components. In includes many useful tools and components that can be easily downloaded and installed by using PEAR package manager. This
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Read the complete post at http://blogs.iis.net/ruslany/archive/2010/11/22/how-to-install-php-pear-and-phploc-on-windows.aspx