Re: what is a "global"

--- Ryan A <ryan@coinpass.com> wrote: > I thought i knew the useage of the "global" keyword in a function but > after reading a pals program i am really confused, i tried > http://php.net/global but that does not give me any > results...searched > the list and found some reference to global and the "scope" of the > function but still confused. > > Anybody have a good link or can give me a place to read up on the > defination with an example? There are two scopes you need to understand in order to grok this: 1. Global 2. Function Local Most "normal" variables are global. There are, of course, the "superglobals" that PHP provides, but a $foo that you create is global. The exception is when you create $foo within a function. In this case, its scope is local to that function only. If you want it to be global instead, you can declare it as such. As a result of this, there are two ways that a function can manipulate global data: 1. The variable is passed in by reference. 2. The variable is declared to be global. Hope that helps. Chris ===== My Blog http://shiflett.org/ HTTP Developer's Handbook http://httphandbook.org/ RAMP Training Courses http://www.nyphp.org/ramp