Doc #72656 [Ver->Csd]: Object destructor called before constructor

Edit report at https://bugs.php.net/bug.php?id=72656&edit=1 ID: 72656 Updated by: git@php.net Reported by: joe88 dot ds at gmail dot com Summary: Object destructor called before constructor -Status: Verified +Status: Closed Type: Documentation Problem Package: Scripting Engine problem Operating System: Windows 7 x64 PHP Version: 5.5.38 Assigned To: cmb Block user comment: N Private report: N New Comment: Automatic comment on behalf of cmb69 Revision: https://github.com/php/doc-en/commit/06126805f490aba6f6c107980f673eada0c79e6c Log: Fix #72656: Object destructor called before constructor Previous Comments: ------------------------------------------------------------------------ [2021-08-27 11:11:30] cmb@php.net No, this is not a bug. Actually, the behavior is mostly documented[1]: | Classes which have a constructor method call this method on each | newly-created object, […] and[2]: | The destructor will be called even if script execution is | stopped using exit(). The only missing peace to the puzzle is eager evaluation of function arguments, which doesn't appear to be documented yet. [1] <https://www.php.net/manual/en/language.oop5.decon.php#language.oop5.decon.constructor> [2] <https://www.php.net/manual/en/language.oop5.decon.php#language.oop5.decon.destructor> ------------------------------------------------------------------------ [2016-07-25 09:48:04] cmb@php.net There doesn't even need to be an error handler involved, see <https://3v4l.org/cR3nF>. Looking at the opcodes[1] hints at what's going on behind the scenes: first NEW is executed, and only after that the arguments for the constructor are evaluated, which, in this case, cause the script to terminate, without actually calling the constructor. On shutdown, however, the newly created object gets properly destroyed by calling its destructor. In my opinion, this is a bug. [1] <https://3v4l.org/cR3nF/vld#tabs> ------------------------------------------------------------------------ [2016-07-23 05:29:10] joe88 dot ds at gmail dot com Description: ------------ Calling exit from a user error handler causes an object to be destructed, even if the object was never constructed. Test script: --------------- http://pastebin.com/UeBBj1hK Expected result: ---------------- The Tree's destructor should never be called. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=72656&edit=1