Doc #64847 [Opn->Csd]: It appears that traits may define static member variables

Edit report at https://bugs.php.net/bug.php?id=64847&edit=1 ID: 64847 Updated by: krakjoe@php.net Reported by: mhorowitz at etsy dot com Summary: It appears that traits may define static member variables -Status: Open +Status: Closed Type: Documentation Problem Package: Documentation problem Operating System: linux PHP Version: 5.4.15 -Assigned To: +Assigned To: krakjoe Block user comment: N Private report: N New Comment: This bug has been fixed in the documentation's XML sources. Since the online and downloadable versions of the documentation need some time to get updated, we would like to ask you to be a bit patient. Thank you for the report, and for helping us make our documentation better. Previous Comments: ------------------------------------------------------------------------ [2013-10-13 17:40:02] krakjoe@php.net Automatic comment from SVN on behalf of krakjoe Revision: http://svn.php.net/viewvc/?view=revision&amp;revision=331806 Log: #64847 correction ------------------------------------------------------------------------ [2013-05-15 18:49:28] mhorowitz at etsy dot com Description: ------------ Try it -- put a static variable in a trait declaration, then access that variable in code defined in the trait and/or defined in the "exhibiting" class. It works just fine. I spoke with Rasmus; we both believe this is fine behavior and that the documentation (quoted below) should be changed to make it clear that one can, in fact, declare a static variable within the trait definition. Quote from: http://php.net/manual/en/language.oop5.traits.php "Static variables can be referred to in trait methods, but cannot be defined by the trait." Test script: --------------- <?php // So, the following works and, for my purposes, is really, really useful. trait TTrait { protected static $instance = 'hello there'; public function publicFn() { echo self::$instance . "\n"; echo "publicFn\n"; } } class Foo { use TTrait; public function tryMe() { echo "From Foo: "; $this->publicFn(); echo "In tryMe -- instance is: " . self::$instance . "\n"; } } $f = new Foo(); $f->tryMe(); Expected result: ---------------- As noted, please adjust the doc to reflect that static variable declarations are actually allowed. Currently, name collisions are handled as is done for non- static properties (i.e. E_STRICT error, as per the doc for properties). In the future, it might be nice if the renaming clause would work for static variables too. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=64847&edit=1