If I want a function to return by reference, I do this?
function & myCoolFunction( ) {
$queryObject = new queryObject();
return $queryObject;
}
I get back a reference to the object automatically now? 6 11092
Hi Lawrence, If I want a function to return by reference, I do this?
function & myCoolFunction( ) { $queryObject = new queryObject(); return $queryObject; }
I get back a reference to the object automatically now?
Thats alright. But you have to use the &-operator a second
time when calling the function:
$referencedObje ct =& myCoolFunction( );
(Yes. Really. It is ugly, but it is true. See [1].)
Greetings from Frankfurt/Germany,
Fabian Wleklinski
[1] http://www.php.net/manual/en/functio...ing-values.php
"Fabian Wleklinski" <Wl************ *@eWorks.de> wrote in message I get back a reference to the object automatically now?
Thats alright. But you have to use the &-operator a second time when calling the function:
$referencedObje ct =& myCoolFunction( );
(Yes. Really. It is ugly, but it is true. See [1].)
if I go:
$allEntries = & array_reverse($ allEntries);
Then the array is returned by reference? PHP's memory usage is not
doubled in this exchange? At no point are copies made?
I need to do what I can to keep the memory to a minimum.
Hi lawrence, if I go:
$allEntries = & array_reverse($ allEntries);
No, I don't think so, becauce array_reverse does not return
a reference, as far as I know.
Greetings from Frankfurt / Germany,
Fabian Wleklinski
Fabian Wleklinski wrote: Hi lawrence,
if I go:
$allEntries = & array_reverse($ allEntries);
No, I don't think so, becauce array_reverse does not return a reference, as far as I know.
Greetings from Frankfurt / Germany,
Fabian Wleklinski
Well PHP wouldn't return a reference what he posted would work what it
would do is tell PHP to assign $allEntries to point to the memory
address of whatever array_reverse() was returning instead of copying the
data like it would normally do. In PHP you can pass arround Objects and
Arrays as refernces but passing them like array_reverse(& $allEntries);
is no longer needed or allowed unless you turn off the option in php.ini.
--
John Downey http://delusive.dyn.ee http://sage.dev.box.sk http://blacksun.box.sk
Hi John, Hi Lawrence, Well PHP wouldn't return a reference
Right.
what he posted would work what it would do is tell PHP to assign $allEntries to point to the memory address of whatever array_reverse() was returning instead of copying the data like it would normally do.
May be. That's what would happen in other languages. But I don't
know if PHP really copies the result two times: 1.) from a local
variable inside the method into the result (inside the stack as well),
2.) from the result into the assigned variable. May be PHP goes
another way. I haven't checked the php-source, so I cannot assume
this behaviour.
In PHP you can pass arround Objects and Arrays as refernces but passing them like array_reverse(& $allEntries); is no longer needed or allowed unless you turn off the option in php.ini.
Yes, PHP throws a warning if you do so. But Lawarence hasn't :-)
Greetings from Frankfurt / Germany,
Fabian Wleklinski
Fabian Wleklinski wrote: May be. That's what would happen in other languages. But I don't know if PHP really copies the result two times: 1.) from a local variable inside the method into the result (inside the stack as well), 2.) from the result into the assigned variable. May be PHP goes another way. I haven't checked the php-source, so I cannot assume this behaviour.
Well i am going off what I was told when I used to idle in #php on
irc.freenode.ne t
--
John Downey http://delusive.dyn.ee http://sage.dev.box.sk http://blacksun.box.sk This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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