The StripHtml function strips all the HTML tags in the passed string but preserves the ones specified in the PreserveTags array.

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1. def StripHtml(str, PreserveTags = [‘a’,‘img’,‘p’,‘br’,‘i’,‘b’,‘u’,‘ul’,‘li’])
2.         str = str.strip || ”
3.         PreserveArr = PreserveTags.join(‘|’) << ‘|\/’
4.         str.gsub(/<(\/|\s)*[^(#{PreserveArr})][^>]*>/,”)
5. end