Implementations
The first LOLCODE implementation was a PHP parser written by Jeff Jones. The parser's website was also the first website using LOLCODE as an actual web scripting language. Being open source with a BSD style license, it has been forked and used by multiple websites to implement LOLCODE scripting. The winning Pecha Kucha presentation at PHP Works 2008 was about this parser.
There is a .NET compiler for LOLCODE written by Nick Johnson, and featured in Microsoft developer training seminars, TechEd 2007 Conference (Australia).
PL/LOLCODE, a project headed by Josh Tolley, makes LOLCODE available as a server-side programming language inside PostgreSQL.
Microsoft Dynamic Language Runtime has an implementation of LOLCODE for testing purposes.
A LOLCODE to JavaScript translator is also available
There is also a LOLCODE compiler included with the Parrot virtual machine as one of the languages demonstrating the use of Parrot's compiler tools.
An interpreter written in C by Justin J. Meza interprets LOLCODE efficiently on a variety of platforms.
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