I had been wondering what language you had to program bots (the elements that crawl online ex: for lookup engines)
could you system one in php or would you might want to do it in java (C maybe)
Not at all C. If you’re any rebel (and have excessive free time), probably C++. If it is really something simple, PHP. In case you are serious, Java (multithreading may possibly crawl multiple places at once and Java possesses better NIO functions).