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basic 8
What do you know about form actions this one method is GET and the variables are tacked onto the end of the URL in which the script is run.. Soo think about it like this if I am want the variable string to be equal to hello world in the url it would look something like this (www.site.com/script.php?site=hello world) now think about how you would use that with the variable you know and your knowledge about sql syntax. If you need help with sql syntax there is w3schools as well as multiple articles on this site to help you