Tickets :: Comment on [#6837] Singletons and references

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Comment	> Hello together, > > > > I'm currently debugging a heap memory corruption in PHP (5.2.6) using Horde > > and noticed some odd behavior regarding references and static variables. > > Currently we implement some of our singletons like this: > > > > ----------------------------- > > function &singleton() > > { > > static $history; > > > > if (!isset($history)) { > > $history = &new Horde_History(); > > } > > > > return $history; > > } > > ----------------------------- > > > > I've found out that the singleton is not working and it's related to this: > > http://www.php.net/manual/en/language.variables.scope.php > > The part with "References with global and static variables" is important. > > > > -> The code has to be changed to "$history = new Horde_History();" > > Singletons storing their references via an array are unaffected. > > > > If there a no objections I'll start fixing the static variables. > > > > I really hope this will solve my trouble (=segfaults) deep inside > > the PHP memory manager during request shutdown. Spending two days > > in gdb, debugging internal PHP memory structures is no fun at all :o) > > > > Cheers, > > Thomas > >
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