Bug #63825 [Csd->Nab]: php dose not follow the operator precedence

Edit report at https://bugs.php.net/bug.php?id=63825&edit=1 ID: 63825 Updated by: johannes@php.net Reported by: rssidea at qq dot com Summary: php dose not follow the operator precedence -Status: Closed +Status: Not a bug Type: Bug Package: *Compile Issues Operating System: all PHP Version: 5.3.20 Block user comment: N Private report: N Previous Comments: ------------------------------------------------------------------------ [2012-12-21 06:30:50] rssidea at qq dot com I find a note in documentation:Although = has a lower precedence than most other operators, PHP will still allow expressions similar to the following: if (!$a = foo()), in which case the return value of foo() is put into $a. so, this is not a bug, but it may be a snare :) ------------------------------------------------------------------------ [2012-12-21 06:10:55] rssidea at qq dot com Description: ------------ By Operator Precedence on http://php.net/manual/en/language.operators.precedence.php, logical operator '||' is higher than assignment operator '=', so the script below should cause a syntax error. Test script: --------------- $a = $b = 0; if ($a = 1 || $b = 1) { echo $a; } Expected result: ---------------- execute as: if ($a = (1 || $b) = 1) { output: syntax error, unexpected '=' Actual result: -------------- execute as: if ($a = (1 || ($b = 1))) { output: 1 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=63825&edit=1