PHP：从string_array_中删除string_array_B中包含的所有字符串

what I need is quite simple (for real php programmers :-D ) I have 2 strings array. string_array_A contains a set of words contained in a post on my forum string_array_B contains a set of words I don't want to be indexed in the search engine of my forum (just for db occupation reason). So I would like to remove, from string_array_A, all the words contained in the string_array_B. I would do 2 while loop, but maybe there are some high level functions I could use. Thanks for your help !what I need is quite simple (for real php progr