Re: allow_call_time_pass_reference?

Thanks for this clarification! atu ----- Original Message ----- From: "Curt Zirzow" <php-general@zirzow.dyndns.org> To: <php-general@lists.php.net> Sent: Saturday, August 30, 2003 6:10 PM Subject: Re: [PHP] allow_call_time_pass_reference? > * Thus wrote Armand Turpel (armand@a-tu.net): > > Why allow_call_time_pass_reference is deprecated? I mean it should be the > > choice of the programmer to make use of pass by reference or not. > > > > Example: > > > > $this_string = $is_really_big // lets say 500 kb > > > > function ($this_string){} // Here the function takes a copy of $this_string > > (500 kb) -> in php4 > > > > function (& $this_string){} // Here the function takes only the address of > > $this_string (I guess an int value) > > > > Make use of the second function is less memory intense. So again. Why this > > feature should be deprecated? And why (the nonsens!) to give hostmasters the > > possibility to switch this off in the php.ini? > > You aren't understanding what that flag does: > > <php.ini> > ; - allow_call_time_pass_reference = Off [Code cleanliness] > ; It's not possible to decide to force a variable to be passed by reference > ; when calling a function. The PHP 4 style to do this is by making the > ; function require the relevant argument by reference. > </php.ini> > > This flag does not apply to what you have above. What this disables > is the ablity to decide at 'call time', of the function, to pass by > reference or not. This was an old method and changed in php 4: > > > function foo($bar) { } > foo(&$mybar); // this is what it doesn't allow. > > > It is up to the function to declare if you want to pass by > reference or not, this is not depricated: > > function foo_reference(&$bar) { } > function foo_copy($bar) { } > > > Curt > -- > "I used to think I was indecisive, but now I'm not so sure." > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > > >