note 110846 added to language.operators.bitwise
| From: | erich at seachawaii dot com | Date: | Fri, 14 Dec 2012 03:15:55 +0000 |
| Subject: | note 110846 added to language.operators.bitwise | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-192524@lists.php.net to get a copy of this message | ||
Just a note regarding negative shift values, as the documentation states each shift is an integer
multiply or divide (left or right respectively) by 2. That means a negative shift value (the right
hand operand) effects the sign of the shift and NOT the direction of the shift as I would have
expected.
FE. 0xff >> -2 results in 0x0
and 0xff << -2 result in 0xFFFFFFFFC0000000 (dependant on PHP_INT_MAX)
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Manual Page -- http://php.net/manual/en/language.operators.bitwise.php
Edit -- https://master.php.net/note/edit/110846
Del: integrated -- https://master.php.net/note/delete/110846/integrated
Del: useless -- https://master.php.net/note/delete/110846/useless
Del: bad code -- https://master.php.net/note/delete/110846/bad+code
Del: spam -- https://master.php.net/note/delete/110846/spam
Del: non-english -- https://master.php.net/note/delete/110846/non-english
Del: in docs -- https://master.php.net/note/delete/110846/in+docs
Del: other reasons-- https://master.php.net/note/delete/110846
Reject -- https://master.php.net/note/reject/110846
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