Rasmus Lerdorf

Rasmus Lerdorf is a Danish programmer with Canadian citizenship and is most notable as the creator of the PHP scripting language. He started the PHP Project back in 1995 and has been actively involved in PHP development ever since. Also involved in a number of other Open Source projects, Rasmus is a long time Apache contributor and foundation member. He is the author of the first edition of the PHP Pocket Reference, and the co-author of Programming PHP

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His family moved to Canada in 1980, and moved to King City in 1983.He graduated from King City Secondary School in 1988, and in 1993 he graduated from the University of Waterloo with Bachelor of Applied Science in Systems Design Engineering. He contributed to the Apache HTTP Server and he added the LIMIT clause to the MSQL DBMS. The LIMIT clause was later adapted by several other DBMS.

From September 2002 to 6 November 2009 he was employed by Yahoo! Inc. as an Infrastructure Architecture Engineer. In 2010, he joined WePay in order to develop their API.



Throughout 2011 he was a roving consultant for startups. On 22 February 2012 he announced on Twitter that he had joined Etsy.

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Lerdorf is a frequent speaker at Open Source conferences around the world. During his keynote presentation at OSCMS 2007, he presented security vulnerability in each of the projects represented at the conference that year.

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  • Lerdorf joined Yahoo in 2002 and has worked for the company as engineer and then left in 2009.
  • PHP was developed further and commercialized by Zend, but Lerdorf has maintained an ongoing involvement with the open source project

In 2003, he was named to the MIT Technology Review TR100 as one of the top 100 innovators in the world under the age of 35