Re: Local variable protection

On Oct 13, 2011, at 11:37 AM, Tim Streater wrote: > On 13 Oct 2011 at 16:25, Tedd Sperling <tedd.sperling@gmail.com> wrote: >> So, if you want a main script variable (i.e., $myVar) to be accessed by a >> function, you can do it by stating: >> >> myFunction >> { >> global $myVar; >> // and then using $myVar >> } >> >> or >> >> myFunction >> { >> $myVar = $GLOBAL['myVar'] >> // and then using $myVar >> } > > But presumably these are not *quite* equivalent, as modifying $myVar will change the global in > the first but not in the second. > > -- > Cheers -- Tim Tim: I see what you are saying, but the reason for that $myVar declared within the function is local to that function and will not change the value of $myVar in the main script -- as such, illustrating differences in scope. But the reason for my post was to illustrate that IF one declares a variable in the main script THEN that variable will also be automagically included in the $GLOBAL array. In short, you cannot write a script without having a $GLOBAL array that contains every variable you create in the main script -- that is what I found surprising. YSMV (Your Surprise May Vary). Cheers, tedd _____________________ tedd@sperling.com http://sperling.com