note 83252 added to language.oop5.decon

I ran into an interesting (and subtle) code error while porting some code to PHP 5.2.5 from PHP 4.4.8 that I think illustrates a noteworthy semantic. I have a hierarchy of classes with both styles of constructors but where one in the middle was missing the __construct() function (it just had the old-style one that called the (nonexistent) __construct()). It worked fine in PHP4 but caused an endless loop (and stack overflow) in PHP5. I believe what happened is that in PHP4 the old-style constructor was not called, but in PHP5 it was (due to the "emulation" of PHP4), and since _construct() wasn't defined for that class, the call to $this->__construct() caused a looping call to the original (lowest child) constructor. ---- Server IP: 208.69.120.35 Probable Submitter: 208.178.64.62 ---- Manual Page -- http://www.php.net/manual/en/language.oop5.decon.php Edit -- https://master.php.net/note/edit/83252 Del: integrated -- https://master.php.net/note/delete/83252/integrated Del: useless -- https://master.php.net/note/delete/83252/useless Del: bad code -- https://master.php.net/note/delete/83252/bad+code Del: spam -- https://master.php.net/note/delete/83252/spam Del: non-english -- https://master.php.net/note/delete/83252/non-english Del: in docs -- https://master.php.net/note/delete/83252/in+docs Del: other reasons-- https://master.php.net/note/delete/83252 Reject -- https://master.php.net/note/reject/83252 Search -- https://master.php.net/manage/user-notes.php