note 30189 added to language.operators.bitwise

A previous comment indicates that << is actually a rotation operation. I believe this is incorrect. Instead the behaviour is the same as C and many other languages. Efectively you can consider all amounts to be modulo the size of the type. ie: 1 << 36 == 1 << (36 mod 32) == 1 << 4 == 16 This is generally an artifact of the architecture, rather then a specifically defined part of the language. Hence such operations should be considered undefined. Note in partiular doing: $x = $x << 32 to clear a int will NOT work, as it is effectively a no-op. -- http://www.php.net/manual/en/language.operators.bitwise.php http://master.php.net/manage/user-notes.php?action=edit+30189 http://master.php.net/manage/user-notes.php?action=delete+30189 http://master.php.net/manage/user-notes.php?action=reject+30189