Hi, marcus
Thanks for the further investigation.
I later found my test doesn't do the same thing as the one
supplied in #20175 (sorry for confusions), because if the
referenced thing is virtually a kind of resource identifier
(i.e. ZE2 spec), there must be no such problem.
Anyway I think statics should be able to hold a referenced
value. Won't it be fixed?
Moriyoshi
[EMAIL PROTECTED] (Marcus Boerger) wrote:
> Attached you see it as a .phpt file (but where is the difference between
> your ZE1/2 results).
>
> Part 2: bar_static() is the test that failed in bug20175 but
> i think the way Zend Engine 1.1/2 do it now is correct because
> they return copies.
> Part 3: indeed seems to be an error. Because the manual says one
> can return a reference but it shows you can't.
>
> =tests/lang/bug20175.phpt=====
> --TEST--
> Bug #20175 (Static vars can't store ref to new instance)
> --FILE--
> <?php
> /* Part 1:
> * Storing the result of a function in a static variable.
> * foo_global() increments global variable $foo_count whenever it is executed.
> * When foo_static() is called it checks for the static variable $foo_value
> * being initialised. In case initialisation is necessary foo_global() will be
> * called. Since that must happen only once the return value should be equal.
> */
> $foo_count = 0;
>
> function foo_global() {
> global $foo_count;
> return 'foo:' . ++$foo_count;
> }
>
> function foo_static() {
> static $foo_value;
> if (!isset($foo_value)) {
> $foo_value = foo_global();
> }
> return $foo_value;
> }
>
> /* Part 2:
> * Storing a reference to the result of a function in a static variable.
> * Same as Part 1 but:
> * The return statment transports a copy of the value to return. In other
> * words the return value of bar_global() is a temporary variable only valid
> * after the function call bar_global() is done in current local scope.
> */
> $bar_global = 0;
>
> function bar_global() {
> global $bar_count;
> return 'bar:' . ++$bar_count;
> }
>
> function bar_static() {
> static $bar_value;
> if (!isset($bar_value)) {
> $bar_value = &bar_global();
> }
> return $bar_value;
> }
>
> /* Part 3:
> * Storing a reference to the result of a function in a static variable.
> * Same as Part 2 but wow_global() returns a reference.
> */
> $wow_global = 0;
> $wow_name = '';
>
> function &wow_global() {
> global $wow_count, $wow_name;
> $wow_name = 'wow:' . ++$wow_count;
> return $wow_name;
> }
>
> function wow_static() {
> static $wow_value;
> if (!isset($wow_value)) {
> $wow_value = &wow_global();
> }
> return $wow_value;
> }
>
> print zend_version()."\n";
> print foo_static()."\n";
> print foo_static()."\n";
> print bar_static()."\n";
> print bar_static()."\n";
> print wow_static()."\n";
> print wow_static()."\n";
> ?>
> --EXPECTF--
> %s
> foo:1
> foo:1
> bar:1
> bar:2
> wow:1
> wow:1
> =EOF==============================
>
> At 21:51 30.10.2002, Moriyoshi Koizumi wrote:
> >I've simplified the test code, and I still have got a strange result
> >with ZE2.
> >
> >------------------------------------------------------
> ><?php
> > function foo() {
> > static $value;
> > if (!isset($value)) {
> > $value = rand(0,100);
> > }
> > return $value;
> > }
> >
> > function bar() {
> > static $value;
> > if (!isset($value)) {
> > $value = &rand(0,100);
> > }
> > return $value;
> > }
> >
> > print zend_version()."\n";
> > print foo()."\n";
> > print foo()."\n";
> > print bar()."\n";
> > print bar()."\n";
> >?>
> >------------------------------------------------------
> >
> >with ZE1
> >------------------------------------------------------
> >1.3.0
> >26
> >26
> >75
> >95
> >------------------------------------------------------
> >
> >with ZE2
> >------------------------------------------------------
> >2.0.0-alpha3
> >34
> >34
> >29
> >92
> >------------------------------------------------------
> >
> >Is this a known behaviour?
> >
> >
> >Moriyoshi
> >
> >--
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>
>
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