On Fri, 1 Aug 2003, Rasmus Lerdorf wrote:
My apologies, my explanation wasn't very clear. my initialization function
needs to both parse the argument stack, but it also declars a few user
defined variables to be global.
I did not include the portion of code in my snippet that ensures the
function is only called from within a user defined function.
Ken
> Your code doesn't make much sense to me. This is your code, right?
>
> if(zend_hash_find(&EG(symbol_table), var, strlen(var)+1, (void
> **)&vars_data)!=FAILURE)
> {
> ZEND_SET_SYMBOL(EG(active_symbol_table), var, *vars_data);
> }
>
> So you look for a global variable named whatever the contents of 'var' is.
> If you find it, you put it in the function-local symbol table. This is
> not at all what you said you wanted to do. And you don't check to see if
> the active_symbol_table is the same as the symbol_table which it would be
> if you were to call this function from the global scope.
>
> -Rasmus
>
> On Fri, 1 Aug 2003, Ken Spencer wrote:
>
> > On Fri, 1 Aug 2003, Mark Spruiell wrote:
> >
> >
> > Mark, thanks for your reply. The situation is, is that I am writing a
> > large piece of software with several hundred functions. At the beginning
> > of each function I have som initialization code that allows me to do
> > several thing.
> >
> > Parse through the variables in a non standard way, and define a few
> > variables to be global within the function.
> >
> > The only way I was able to accomplish this in the past was to call an
> > include from the beginning of each function (as there is no way to write a
> > function that uses func_get_args()). Calling this include however is quite
> > inneficient, and I have replaced most of what it does with my C extension.
> >
> > I have also tried using the zend_register_auto_global function, but this
> > appears to cause a great deal of unpredictable behaviour.
> >
> > Cheers,
> >
> > Ken
> >
> >
> >
> > > Hi Ken,
> > >
> > > I'm fairly new to PHP extension programming, so forgive me if I'm
> > > missing the obvious, but your code appears to be trying to copy a
> > > global variable to a local scope. Is that your intent?
> > >
> > > If so, why can't the script do this itself by using a "global"
> > > declaration for the variable? For example:
> > >
> > > <?
> > > $v = "foo";
> > >
> > > function bar()
> > > {
> > > global $v;
> > > echo "v = $v\n";
> > > }
> > > ?>
> > >
> > > As for why you're getting a segfault, I suspect it's a reference
> > > counting issue. Have a look at the definition of
> > > ZEND_SET_SYMBOL_WITH_LENGTH in zend_API.h and you'll see it is
> > > modifying the container you retrieved from EG(symbol_table).
> > >
> > > Good luck,
> > > - Mark
> > >
> > > > I am trying to make a function for my extension that makes a predefined
> > > > variable global
> > > >
> > > > I have tried something along the lines of:
> > > >
> > > > if(zend_hash_find(&EG(symbol_table), var, strlen(var)+1, (void **)
> > > > &vars_data)!=FAILURE)
> > > > {
> > > > ZEND_SET_SYMBOL(EG(active_symbol_table), var, *vars_data);
> > > > }
> > > >
> > > > but it seg faults upon second execution.
> > > >
> > > > Can someone reccomend a more successful method of accomplishing this?
> > > >
> > > >
> > > > Chhers,
> > > >
> > > > Ken
> > > >
> > > >
> > > >
> > > > --
> > > > PHP Internals - PHP Runtime Development Mailing List
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> > > >
> > > >
> > >
> > >
> > >
> >
> >
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> >
>
>
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