From a7ef3cd8b10e789795d716f18f7139c5ee292edb Mon Sep 17 00:00:00 2001 From: Jakub Vrana Date: Thu, 10 Feb 2011 12:42:46 +0000 Subject: [PATCH] Don't mix + and ++ (doc bug #53786) git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@308186 c90b9560-bf6c-de11-be94-00142212c4b1 --- language/operators.xml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/language/operators.xml b/language/operators.xml index 2bab4640b2..13d7bfc31c 100644 --- a/language/operators.xml +++ b/language/operators.xml @@ -221,6 +221,10 @@ $a = true ? 0 : true ? 1 : 2; // (true ? 0 : true) ? 1 : 2 = 2 $a = 1; $b = 2; $a = $b += 3; // $a = ($b += 3) -> $a = 5, $b = 5 + +// mixing ++ and + produces undefined behavior +$a = 1; +echo ++$a + $a++; // may print 4 or 5 ?> ]]>