regexComparisonModule.psm1
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function Compare-RegExDate{ param( [string]$inputString ) $regDay = '([0-3]{1}?[0-9]{1}|[\d])' $regYear = '([1-2][0-9]{3})|[\d]{2}' $months = '([Jj](an)(uary)?|[Ff](eb)(ruary)?|[Mm](ar)(ch)?|[Aa](pr)(il)?|[Mm](ay)|[Jj](un)(e)?|[Jj](ul)(y)?|[Aa](ug)(ust)?|[Ss](ep)(tember)?|[Ss](ept)|[Oo](ct)(ober)?|[Nn](ov)(ember)?|[Dd](ec)(ember)?)' $numericalMonths = '(([1][0-2])|[0][\d]{1}|[\d]{1})' $regEx1 = "(($regDay((\sof\s)|(\s?\-\s?)|\s|\/)($months|$numericalMonths))([,-\/]|\s)\s?($regYear))" $regEx2 = "(($months)\s$regDay[,]?\s($regYear))" $regEx3 = "($numericalMonths[\/\-,.]$regDay[\/\-,.]($regYear))" $regEx4 = "($regDay[\/\-,]$numericalMonths[\/\-,]($regYear))" $dateExpression = $regEx1+"|"+$regEx2+"|"+$regEx3+"|"+$regEx4 if($inputString -match $dateExpression){ return $true }else{ return $false } } Export-ModuleMember -Function Compare-RegExDate |