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Websites can still be hacked using SQL injection - Tom explains how sites written in PHP (and other languages too) can be vulnerable and have basic security issues. More from Tom Scott: http://www.youtube.com/user/enyay and https://twitter.com/tomscott Follow the Cookie Trail: http://www.youtube.com/watch?v=LHSSY8QNvew CERN Computing Centre u0026 Mouse Farm: http://www.youtube.com/watch?v=S0MgJFGL5jg http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels