Req #66361 [Opn->Dup]: Risky behavior of switch statement

Edit report at https://bugs.php.net/bug.php?id=66361&edit=1 ID: 66361 Updated by: rasmus@php.net Reported by: mmshfe at gmail dot com Summary: Risky behavior of switch statement -Status: Open +Status: Duplicate Type: Feature/Change Request Package: SPL related Operating System: Any OS PHP Version: Irrelevant Block user comment: N Private report: N Previous Comments: ------------------------------------------------------------------------ [2013-12-27 20:37:55] mmshfe at gmail dot com Description: ------------ As mentioned in docs, switch statement is a loose type comparison tool. But this may be lead to a serious bug in user products. It would be really better to force it to use strong type comparison (or have an option such as an optional 2nd argument let the users to do so). In the real world, we have no other loose type languages that behaves like this. For example, in JavaScript, the result is fine. I mean, although being a loose type language is a good feature for PHP in overall; It should not be led to unexpected results those not shown in any other language (even the other loose type ones). I really now the process flow. It uses if, elseif, else statements like this: if($v == 'hello') { echo 'Hello'; } elseif($v == 'goodbye') { echo 'Goodbye'; } else { echo 'Error'; } And 'hello' is converted to integer (with intval('hello') or anything similar) and because it does not contain an integer value at the beginning, it uses the default integer value (zero) and so, the first case becomes true. All I want to say is that this behavior is incorrect because approximately always it's not the behavior that the developer expected. Test script: --------------- $v = 0; switch($v) { case 'hello': echo 'Hello'; break; case 'goodbye': echo 'Goodbye'; break; default: echo 'Error'; break; } Expected result: ---------------- Error Actual result: -------------- Hello ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=66361&edit=1