Rasmus Lerdorf

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Rasmus Lerdorf
Rasmus Lerdorf August 2014 (cropped).JPG
Born (1968-11-22) 22 November 1968 (age 48)
Qeqertarsuaq, Greenland
Alma mater University of Waterloo
Occupation Distinguished Engineer, Etsy
Website http://lerdorf.com
Rasmus Lerdorf talks about security with Joomla! developers at OSCMS 2007 Conference.

Rasmus Lerdorf (born 22 November 1968) is a Greenlandic-Danish programmer. He created the PHP scripting language, authoring the first two versions of the language and participated in the development of later versions led by a group of developers including Jim Winstead (who later created blo.gs), Stig Bakken, Shane Caraveo, Andi Gutmans, and Zeev Suraski. He continues to contribute to the project.

Early life and education[edit]

Lerdorf's family moved to Canada from Denmark, in 1980, and later moved to King City, Ontario in 1983.[1] He graduated from King City Secondary School in 1988, and in 1993 he graduated from the University of Waterloo with a 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. A variant of this LIMIT clause had already been around for a decade in mainframe relational database management systems (like Oracle Rdb running on VAX/VMS, formerly from Digital Equipment Corporation), but apparently it had not yet been picked up by the emerging PC-based databases. It was later adapted by several other SQL-compatible DBMS.[2][3]


From September 2002 to November 2009 Lerdorf was employed by Yahoo! Inc. as an Infrastructure Architecture Engineer. In 2010, he joined WePay in order to develop their application programming interface.[4] Throughout 2011 he was a roving consultant for startups. On 22 February 2012 he announced on Twitter that he had joined Etsy.[5] In July, 2013 Rasmus joined Jelastic as a senior advisor to help them with the creation of new technology.[6]

Lerdorf is a frequent speaker at Open Source conferences around the world. During his keynote presentation at OSCMS 2007, he presented a security vulnerability in each of the projects represented at the conference that year.[7]


In 2003, Lerdorf was named in the MIT Technology Review TR100 as one of the top 100 innovators in the world under the age of 35.[8]


  1. ^ "Rasmus Lerdorf" (PDF). K.C.S.S. Alumni Association. Retrieved 2013-02-21. 
  2. ^ "mod_info". Apache Reference. Retrieved 2012-05-06. 
  3. ^ Wendel, Ulf. "MaxDB & PHP - Ready for the Web!". Archived from the original on 2011-06-06. Retrieved 2012-05-06. 
  4. ^ Kincaid, Jason (2010-04-27). "PHP Founder Rasmus Lerdorf Joins Group Payments Startup WePay". TechCrunch. Retrieved 2012-05-06. 
  5. ^ Lerdorf, Rasmus (2012-02-22). "Excited to be joining...". Twitter. Retrieved 2012-05-06. 
  6. ^ "The Creator Of PHP Shows Jelastic Support, As Advisor". Cloud Tweaks. Retrieved 2 July 2013. 
  7. ^ "Rasmus Lerdorf Presentation at the OSCMS Summit 2007". 
  8. ^ "2003 Young Innovators Under 35". Technology Review. 2003. Retrieved August 15, 2011. 

External links[edit]