note 98979 added to language.operators.bitwise

It says above that the effect of E_ALL & ~E_NOTICE can also be achieved by E_ALL ^ E_NOTICE NB: XOR is not equivalent to AND NOT. This only works here because E_ALL consists of 1s mostly, with the exception of the bit for E_STRICT. As E_ALL means all error levels apart from E_STRICT. XORing any error level switches it off, but XORing E_STRICT will switch it on. E_ALL ^ E_NOTICE : E_NOTICE switched off E_ALL ^ E_STRICT : E_STRICT switched on E_ALL & ~E_NOTICE : E_STRICT switched off E_ALL & ~E_STRICT : E_STRICT remains switched off ---- Server IP: 69.147.83.197 Probable Submitter: 93.97.175.65 ---- Manual Page -- http://www.php.net/manual/en/language.operators.bitwise.php Edit -- https://master.php.net/note/edit/98979 Del: integrated -- https://master.php.net/note/delete/98979/integrated Del: useless -- https://master.php.net/note/delete/98979/useless Del: bad code -- https://master.php.net/note/delete/98979/bad+code Del: spam -- https://master.php.net/note/delete/98979/spam Del: non-english -- https://master.php.net/note/delete/98979/non-english Del: in docs -- https://master.php.net/note/delete/98979/in+docs Del: other reasons-- https://master.php.net/note/delete/98979 Reject -- https://master.php.net/note/reject/98979 Search -- https://master.php.net/manage/user-notes.php