note 78725 added to control-structures.switch

Something not mentioned in the documentation itself, and only touched on momentarily in these notes, is that the default: case need not be the last clause in the switch. <?php for($i=0; $i<8; ++$i) { echo $i,"\t"; switch($i) { case 1: echo "One"; break; case 2: default: echo "Thingy"; break; case 3: case 4: echo "Three or Four"; break; case 5: echo "Five"; break; } echo "\n"; } ?> Outputs what you'd expect, namely 0 Thingy 1 One 2 Thingy 3 Three or Four 4 Three or Four 5 Five 6 Thingy 7 Thingy with case 2 and the default both producing the same result ("Thingy"); strictly speaking, the case 2 clause is completely empty and control just falls straight through. The same result could have been achieved with <?php switch($i) { case 1: echo "One"; break; case 3: case 4: echo "Three or Four"; break; case 5: echo "Five"; break; default: echo "Thingy"; break; } ?> But if "case 2" represented a fairly common case (other than "everything else"), then it would be better to declare it explicitly, not only because it saves time by not having to test EVERY other case first (in the current example, PHP finds 'case 2' in the first switch in two tests, but in the second switch it has to make four tests before giving up and going with the default) but also because someone (perhaps yourself in a few months' time) will be reading the code and expecting to see it handled. Listing it explicitly aids comprehension ---- Server IP: 203.89.181.186 Probable Submitter: 60.234.168.92 ---- Manual Page -- http://www.php.net/manual/en/control-structures.switch.php Edit -- https://master.php.net/note/edit/78725 Del: integrated -- https://master.php.net/note/delete/78725/integrated Del: useless -- https://master.php.net/note/delete/78725/useless Del: bad code -- https://master.php.net/note/delete/78725/bad+code Del: spam -- https://master.php.net/note/delete/78725/spam Del: non-english -- https://master.php.net/note/delete/78725/non-english Del: in docs -- https://master.php.net/note/delete/78725/in+docs Del: other reasons-- https://master.php.net/note/delete/78725 Reject -- https://master.php.net/note/reject/78725 Search -- https://master.php.net/manage/user-notes.php