Edit report at https://bugs.php.net/bug.php?id=61954&edit=1
ID: 61954 Updated by: [email protected] Reported by: dm at dmillerweb dot com Summary: Multi-CASE line for SWITCH Status: Open Type: Feature/Change Request Package: *General Issues Operating System: N/A PHP Version: 5.4.2 Block user comment: N Private report: N New Comment: As said in a comment: switch ($color) { case "blue": case "green": case "aqua": /* ...*/ } Exists. As a case statement allows arbitrary expressions linking options without extra case would be painful. We won't change the language there. Previous Comments: ------------------------------------------------------------------------ [2012-05-06 13:21:48] phristen at yahoo dot com Or... you could just use an if() ;) ------------------------------------------------------------------------ [2012-05-05 22:08:44] anon at anon dot anon Several other languages do support fancier rules in their switch statements, though. One variant of the B language (B being the language which first devised the current syntax for the switch statement) allowed ranges such as "case 1 :: 10" and comparisons such as "case >= 5". Most BASICs allow ranges ("CASE 1 TO 10"), comparisons ("CASE IS < 5"), and comma-separated values ("CASE 2, 4, 6"). Ruby allows comma separated values ("when 2, 4, 6") and ranges ("when 1..10"). It would be useful if PHP supported some of those features. ------------------------------------------------------------------------ [2012-05-05 21:45:02] anon at anon dot anon The standard way to accept multiple case values (in all C-like languages, including PHP) is to put multiple case labels. It's not quite as succinct as your example, but it does fulfill the purpose of allowing you to only write the handlers once: switch ($color) { case "blue": case "green": case "aqua": echo $color . " is a cool color."; break; case "red": case "orange": case "brown": echo $color . " is a warm color."; break; } Adding { } around those sections is actually already valid syntax, though in PHP it does nothing because PHP doesn't have block scope (https://en.wikipedia.org/wiki/Scope_%28computer_science%29#Block_scope_within_a_function). In some similar languages, that syntax delimits a scope but doesn't imply a "break;", so PHP could only add that new logic if it's willing to confuse people. It would also break backwards compatibility with any odd code that already has extra { } in its switch handlers. ------------------------------------------------------------------------ [2012-05-05 20:23:47] dm at dmillerweb dot com Description: ------------ --- >From manual page: http://www.php.net/control-structures.switch --- I did not see this capability on the manual page, so please forgive me if such an improvement is already in the works. I believe it would be a great help to upgrade the SWITCH -> CASE statements so they accept multiple values. This would allow us to write only one block of code-to-be-executed even for multiple values. Here's an example: switch ($color) { case: "blue", "green", "aqua" echo $color . " is a cool color." break; case: "red", "orange", "brown" echo $color . " is a warm color." } Also, we could eliminate the need for the BREAK statement by allowing code after the CASE statement to be enclosed in braces; the closing brace for that code would indicate an automatic BREAK. Hope this helps. David Miller ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=61954&edit=1
