Hello all,

Thanks to a lot of help here, I'm getting better at regexp, but I have a problem where I'm not even sure where to start.

I want to check a string that contains one or more of the following comma seperated values (in any order): -config,-files,-params,-driverPath,-appPath,-batchPath. I do not want to allow duplicates or the string could match: NONE. So, following are some examples: 

$s = "-config,-files"  VALID
$s = "-files,-batchPath"  VALID
$s = "-files,-batch-driverPath"  NOT VALID, not comma seperated.
$s = "NONE"     VALID
$s = "NONE,-params"    NOT VALID, can not mix [NONE] with other values
+.
$s = " -config, -files "   NOT VALID, spaces not allowed (beginning, m
+iddle or end)
$s = "-test"               NOT VALID, not a valid parameter
$s = "-files,-test,-batchPath"   NOT VALID, valid parameters mixed wit
+h invalid parameters.
$s = "-files,files"    NOT VALID, same valid listed 2x
$s = "-config,-files,-params,-driverPath,-appPath,-batchPath"     VALI
+D

[download]
Any help would be greatly appreciated.

In reply to Regular expression question by TASdvlper

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