PHP can facilitate helping your online business. Its a scripting language, so the tools you use that are written in PHP will be what helps your online business.
That's a terrible way to put it. For someone who seems new to this area, I can seen the interpretation meaning "I don't have to worry about security" when in fact, one should always be worried about security. I run across scripts on a daily basis that rely on register_globals and don't use mysql_real_escape_string, and these are custom coded sites that "professionals" made.