From:             anmeldung at snowgarden dot ch
Operating system: Irrelevant
PHP version:      5.2.1
PHP Bug Type:     Feature/Change Request
Bug description:  Use mathematical sets in if conditions

Description:
------------
It would be nice, if you can use some mathematical sets in if conditions.
This would help to filter input values like integers, string and floats.
For example if you'll check if an input value within your range:
Normal representation -> if ($input >= 0 && $input <= 2)
Math. Set representation -> if ($input === [0; 2])

You can use braces (but they are used in PHP) to represent sets of string
or numbers like -> colors === {'red', 'blue', 'yellow'}

There is also an international standard (ISO 31-11) that defines sets
(http://en.wikipedia.org/wiki/ISO_31-11#Sets)


-- 
Edit bug report at http://bugs.php.net/?id=40438&edit=1
-- 
Try a CVS snapshot (PHP 4.4): 
http://bugs.php.net/fix.php?id=40438&r=trysnapshot44
Try a CVS snapshot (PHP 5.2): 
http://bugs.php.net/fix.php?id=40438&r=trysnapshot52
Try a CVS snapshot (PHP 6.0): 
http://bugs.php.net/fix.php?id=40438&r=trysnapshot60
Fixed in CVS:                 http://bugs.php.net/fix.php?id=40438&r=fixedcvs
Fixed in release:             
http://bugs.php.net/fix.php?id=40438&r=alreadyfixed
Need backtrace:               http://bugs.php.net/fix.php?id=40438&r=needtrace
Need Reproduce Script:        http://bugs.php.net/fix.php?id=40438&r=needscript
Try newer version:            http://bugs.php.net/fix.php?id=40438&r=oldversion
Not developer issue:          http://bugs.php.net/fix.php?id=40438&r=support
Expected behavior:            http://bugs.php.net/fix.php?id=40438&r=notwrong
Not enough info:              
http://bugs.php.net/fix.php?id=40438&r=notenoughinfo
Submitted twice:              
http://bugs.php.net/fix.php?id=40438&r=submittedtwice
register_globals:             http://bugs.php.net/fix.php?id=40438&r=globals
PHP 3 support discontinued:   http://bugs.php.net/fix.php?id=40438&r=php3
Daylight Savings:             http://bugs.php.net/fix.php?id=40438&r=dst
IIS Stability:                http://bugs.php.net/fix.php?id=40438&r=isapi
Install GNU Sed:              http://bugs.php.net/fix.php?id=40438&r=gnused
Floating point limitations:   http://bugs.php.net/fix.php?id=40438&r=float
No Zend Extensions:           http://bugs.php.net/fix.php?id=40438&r=nozend
MySQL Configuration Error:    http://bugs.php.net/fix.php?id=40438&r=mysqlcfg

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