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Title	Test Details Date With Slashes
Expression	^\d{1,2}\/\d{1,2}\/\d{4}$
Description	This regular expressions matches dates of the form XX/XX/YYYY where XX can be 1 or 2 digits long and YYYY is always 4 digits long.
Matches	4/1/2001 | 12/12/2001 | 55/5/3434
Non-Matches	1/1/01 | 12 Jan 01 | 1-1-2001
Author	Rating: Steven Smith

Title	Test Details Pattern Title
Expression	(\w+)\s+\1
Description	This expression uses a BackReference to find occurrences of the same word twice in a row (separated by a space). Matches things like 'mandate dated', which may not be desirable. See Sean Carley's update for a better expression for true repeated word matching.
Matches	hubba hubba | mandate dated | an annual
Non-Matches	may day | gogo | 1212
Author	Rating: Steven Smith

Title	Test Details Pattern Title
Expression	^\w+[\w-\.]*\@\w+((-\w+)|(\w*))\.[a-z]{2,3}$
Description	Email validation. With this short expression you can validate for proper email format. It's short and accurate.
Matches	[email protected] | [email protected] | [email protected]
Non-Matches	[email protected] | [email protected] | smith@foo_com
Author	Rating: Eric Lebetsamer

Title	Test Details Pattern Title
Expression	^\$[0-9]+(\.[0-9][0-9])?$
Description	Validates a dollar amount including a dollar sign and 2 decmals. The decimal and cents are optional.
Matches	$1.50 | $49 | $0.50
Non-Matches	1.5 | $1.333 | this $5.12 fails
Author	Rating: Not yet rated. Bob Levittan

Title	Test Details Pattern Title
Expression	\b(([01]?\d?\d|2[0-4]\d|25[0-5])\.){3}([01]?\d?\d|2[0-4]\d|25[0-5])\b
Description	Most Concise RegExp for matching Decimal IPs. If nothing else, it'll make your code easier to read. (And I know that \d?\d is \d{1,2} but that's 2 extra characters.) --Update: darkone noticed 8 characters could be shaved down. I've edited it to reflect this. Thanks, darkone!
Matches	217.6.9.89 | 0.0.0.0 | 255.255.255.255
Non-Matches	256.0.0.0 | 0978.3.3.3 | 65.4t.54.3
Author	Rating: Sean Schricker

Title	Test Details Pattern Title
Expression	^[0-9]+$
Description	Validate a string to see if it contains a number / integer
Matches	1234567890 | 1234567890 | 1234567890
Non-Matches	http://none | http://none | http://none
Author	Rating: Mr M

Title	Test Details Pattern Title
Expression	(\w+?@\w+?\x2E.+)
Description	Validates an email address
Matches	[email protected]
Non-Matches	[AABB]
Author	Rating: Prasad DV

Title	Test Details Pattern Title
Expression	^[0,1]?\d{1}\/(([0-2]?\d{1})|([3][0,1]{1}))\/(([1]{1}[9]{1}[9]{1}\d{1})|([2-9]{1}\d{3}))$
Description	This expression checks the validity of a date (US, but it is easily editable for other format's). Year's 1990-9999, Month's 1 or 01 to 12, Day's 1 or 01 to 31. Still needs to have individual months added (i.e., Feb's 28 days), and some how to check for leap year...the months issue should not be to hard, but the leap year seems like a real chore. Please let me know if you have any suggestions for leap year.
Matches	01/01/1990 | 12/12/9999 | 3/28/2001
Non-Matches	3-8-01 | 13/32/1001 | 03/32/1989
Author	Rating: Scott Watermasysk

Title	Test Details Pattern Title
Expression	(^(4|5)\d{3}-?\d{4}-?\d{4}-?\d{4}|(4|5)\d{15})|(^(6011)-?\d{4}-?\d{4}-?\d{4}|(6011)-?\d{12})|(^((3\d{3}))-\d{6}-\d{5}|^((3\d{14})))
Description	This provides an expression to calidate the four major credit cards. It can be easily broken up to use for a specific type of card. It does not validate the number being a potential real number, only in the correct format.
Matches	4111-1234-1234-1234 | 6011123412341234 | 3711-123456-12345
Non-Matches	1234567890123456 | 4111-123-1234-1234 | 412-1234-1234-1234
Author	Rating: Chris Love

Title	Test Details Pattern Title
Expression	^(([1-9])|(0[1-9])|(1[0-2]))\/((0[1-9])|([1-31]))\/((\d{2})|(\d{4}))$
Description	Matches U.S. dates with leading zeros and without and with 2 or four digit years
Matches	01/01/2001 | 1/1/2001 | 01/1/01
Non-Matches	13/01/2001 | 1/2/100 | 09/32/2001
Author	Rating: Chris Becker

Title	Test Details Pattern Title
Expression	((\d{2})|(\d))\/((\d{2})|(\d))\/((\d{4})|(\d{2}))
Description	This matches simple dates against 1 or 2 digits for the month, 1 or 2 digit for the day, and either 2 or 4 digits for the year
Matches	4/5/91 | 04/5/1991 | 4/05/89
Non-Matches	4/5/1
Author	Rating: Andrew Lader

Title	Test Details Pattern Title
Expression	^[0-9]{4}\s{0,1}[a-zA-Z]{2}$
Description	Regular expression to evaluate dutch zipcodes. This is an updated version of Roland Mensenkamp.
Matches	2034AK | 2034 AK | 2034 ak
Non-Matches	2034 AK | 321321 AKSSAA
Author	Rating: Not yet rated. Jon van Leuven

Title	Test Details Pattern Title
Expression	(^|\s|\()((([1-9]){1}|([0][1-9]){1}|([1][012]){1}){1}[\/-]((2[0-9]){1}|(3[01]){1}|([01][1-9]){1}|([1-9]){1}){1}[\/-](((19|20)([0-9][0-9]){1}|([0-9][0-9]){1})){1}(([\s|\)|:])|(^|\s|\()((([0-9]){1}|([0][1-9]){1}|([1][012]){1}){1}[\/-](([11-31]){1}|([01][1-9]){1}|([1-9]){1}){1}[\/-](((19|20)([0-9][0-9]){1}|([0-9][0-9]){1})){1}(([\s|\)|:|$|\>])){1}){1}){1}){1}
Description	Will match the following date formats: Preceded by a Space, Left-parentheses, or at the beginning of a line. Followed by a Space, Right-parentheses, or Colon(:), word boundary or End of line. Can have / or - as separator. Accepts 2 digit year 00-99 or 4 digit years 1900-2099 (can modify to accept any range)
Matches	01/01/2001 | 01-01-2001: | (1-1-01)
Non-Matches	13/1/2001 | 1-32-2001 | 1-1-1801
Author	Rating: David Good

Title	Test Details Pattern Title
Expression	^(([1-9])|(0[1-9])|(1[0-2]))\/(([0-9])|([0-2][0-9])|(3[0-1]))\/(([0-9][0-9])|([1-2][0,9][0-9][0-9]))$
Description	Dates day: d or dd, <= 31, month: m or mm, <= 12, year: yy or yyyy >= 1900, <= 2099
Matches	01/01/2001 | 1/1/1999 | 10/20/2080
Non-Matches	13/01/2001 | 1/1/1800 | 10/32/2080
Author	Rating: Scott Thompson

Title	Test Details Pattern Title
Expression	^(s-|S-){0,1}[0-9]{3}\s?[0-9]{2}$
Description	Validates swedish zipcodes (postnr) with or without space between groups. With leading s- or not. Can be disconnected by removing ''(s-|S-){0,1}''.
Matches	12345 | 932 68 | S-621 46
Non-Matches	5367 | 425611 | 31 545
Author	Rating: Not yet rated. Tommy Ullberg

Title	Test Details Pattern Title
Expression	((0?[13578]|10|12)(-|\/)((0[0-9])|([12])([0-9]?)|(3[01]?))(-|\/)((\d{4})|(\d{2}))|(0?[2469]|11)(-|\/)((0[0-9])|([12])([0-9]?)|(3[0]?))(-|\/)((\d{4}|\d{2})))
Description	Regex used in .NET to validate a date. Matches the following formats mm/dd/yy, mm/dd/yyyy, mm-dd-yy, mm-dd-yyyy This covers days with 30 or 31 days but does not handle February, it is allowed 30 days.
Matches	1/31/2002 | 04-30-02 | 12-01/2002
Non-Matches	2/31/2002 | 13/0/02 | Jan 1, 2001
Author	Rating: Sean McAnally

Title	Test Details Pattern Title
Expression	^[A-Za-z]{1,2}[0-9A-Za-z]{1,2}[ ]?[0-9]{0,1}[A-Za-z]{2}$
Description	This regular expression can be used to validate UK postcodes. Especially useful if want to provide a client side validation on a web site.
Matches	SW112LE | SW11 2LE | CR05LE
Non-Matches	12CR0LE | 12CR 0LE | SWLE05
Author	Rating: Santosh Potadar

Title	Test Details Pattern Title
Expression	^[A-Za-z]{2}[0-9]{6}[A-Za-z]{1}$
Description	UK National Insurance Number validation. Especially useful to validate through clientside/server side script on a website.
Matches	SP939393H | PX123456D | SW355667G
Non-Matches	12SP9393H | S3P93930D | 11223344SP00ddSS
Author	Rating: Not yet rated. Santosh Potadar

Title	Test Details Pattern Title
Expression	20\d{2}(-|\/)((0[1-9])|(1[0-2]))(-|\/)((0[1-9])|([1-2][0-9])|(3[0-1]))(T|\s)(([0-1][0-9])|(2[0-3])):([0-5][0-9]):([0-5][0-9])
Description	Sql date format tester.
Matches	2099-12-31T23:59:59 | 2002/02/09 16:30:00 | 2000-01-01T00:00:00
Non-Matches	2000-13-31T00:00:00 | 2002/02/33 24:00:00 | 2000-01-01 60:00:00
Author	Rating: Peter Pfeifer

Title	Test Details Pattern Title
Expression	^\d{4}[\-\/\s]?((((0[13578])|(1[02]))[\-\/\s]?(([0-2][0-9])|(3[01])))|(((0[469])|(11))[\-\/\s]?(([0-2][0-9])|(30)))|(02[\-\/\s]?[0-2][0-9]))$
Description	- validates a yyyy-mm-dd, yyyy mm dd, or yyyy/mm/dd date - makes sure day is within valid range for the month - does NOT validate Feb. 29 on a leap year, only that Feb. CAN have 29 days
Matches	0001-12-31 | 9999 09 30 | 2002/03/03
Non-Matches	0001\02\30 | 9999.15.01 | 2002/3/3
Author	Rating: Rex Po