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Title	Test Details Pattern Title
Expression	^(?=.*\d).{4,8}$
Description	Password expression. Password must be between 4 and 8 digits long and include at least one numeric digit.
Matches	1234 | asdf1234 | asp123
Non-Matches	asdf | asdf12345 | password
Author	Rating: Not yet rated. Steven Smith

Title	Test Details Pattern Title
Expression	^(?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{4,8}$
Description	Password matching expression. Password must be at least 4 characters, no more than 8 characters, and must include at least one upper case letter, one lower case letter, and one numeric digit.
Matches	asD1 | asDF1234 | ASPgo123
Non-Matches	asdf | 1234 | ASDF12345
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	\(([0-9]{2}|0{1}((x|[0-9]){2}[0-9]{2}))\)\s*[0-9]{3,4}[- ]*[0-9]{4}
Description	Match diferent styles for brazilian Phone number code. Only DDD (12), complete DDD (012), complete DDD + Telephony Company (0xx12) plus 3 or 4 digits (city code) plus 4 digits (phone number).
Matches	(12) 123 1234 | (01512) 123 1234 | (0xx12) 1234 1234
Non-Matches	12 123 1234 | (012) 123/1234 | (012) 123 12345
Author	Rating: Samuel Mota

Title	Test Details Pattern Title
Expression	^(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])$
Description	RegExp for validating the format of IP Addresses. This works great with the ASP.NET RegularExpressionValidator server control.
Matches	127.0.0.1 | 255.255.255.0 | 192.168.0.1
Non-Matches	1200.5.4.3 | abc.def.ghi.jkl | 255.foo.bar.1
Author	Rating: G. Andrew Duthie

Title	Test Details Pattern Title
Expression	^#?([a-f]|[A-F]|[0-9]){3}(([a-f]|[A-F]|[0-9]){3})?$
Description	Tests for valid HTML hexadecimal color codes. The # symbol is optional. And it will except either the 3 digit form for the 216 Web safe colors, or the full 6 digit form. I am use it on my site to allow users to customize the site's colors.
Matches	#00ccff | #039 | ffffcc
Non-Matches	blue | 0x000000 | #ff000
Author	Rating: Chris Craft

Title	Test Details Pattern Title
Expression	Last.*?(\d+.?\d*)
Description	Plucks the last quote of a Stock from the MSN MoneyCentral WebQuote page for any given stock symbol. The URL of the web page where this RegEx should be applied is: http://localhost/asp/webquote.htm?ipage=qd&Symbol=,give the stock symbol here> You must also use the singleline option.
Matches	<TR><TD ALIGN=RIGHT> </TD><TD>Last</TD><TD ALIGN=RIGHT NOW
Non-Matches	[AADDSS]
Author	Rating: Not yet rated. Prasad DV

Title	Test Details Pattern Title
Expression	^([0-9]( |-)?)?(\(?[0-9]{3}\)?|[0-9]{3})( |-)?([0-9]{3}( |-)?[0-9]{4}|[a-zA-Z0-9]{7})$
Description	Matches US phone number format. 1 in the beginning is optional, area code is required, spaces or dashes can be used as optional divider between number groups. Also alphanumeric format is allowed after area code.
Matches	1-(123)-123-1234 | 123 123 1234 | 1-800-ALPHNUM
Non-Matches	1.123.123.1234 | (123)-1234-123 | 123-1234
Author	Rating: Igor Kravtsov

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

Title	Test Details Pattern Title
Expression	^\d{5}-\d{4}|\d{5}|[A-Z]\d[A-Z] \d[A-Z]\d$
Description	This expression matches three different formats of postal codes: 5 digit US ZIP code, 5 digit US ZIP code + 4, and 6 digit alphanumeric Canadian Postal Code. The first one must be 5 numeric digits. The ZIP+4 must be 5 numeric digits, a hyphen, and then 4 numeric digits. The Canadian postal code must be of the form ANA NAN where A is any uppercase alphabetic character and N is a numeric digit from 0 to 9.
Matches	44240 | 44240-5555 | G3H 6A3
Non-Matches	Ohio | abc | g3h6a3
Author	Rating: Steven Smith

Title	Test Details Pattern Title
Expression	^[2-9]\d{2}-\d{3}-\d{4}$
Description	This expression matches a hyphen separated US phone number, of the form ANN-NNN-NNNN, where A is between 2 and 9 and N is between 0 and 9.
Matches	800-555-5555 | 333-444-5555 | 212-666-1234
Non-Matches	000-000-0000 | 123-456-7890 | 2126661234
Author	Rating: Steven Smith

Title	Test Details Pattern Title
Expression	^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$
Description	This expression matches email addresses, and checks that they are of the proper form. It checks to ensure the top level domain is between 2 and 4 characters long, but does not check the specific domain against a list (especially since there are so many of them now).
Matches	[email protected] | [email protected] | [email protected]
Non-Matches	a@b | notanemail | joe@@.
Author	Rating: Steven Smith

Title	Test Details Pattern Title
Expression	^[12345]$
Description	This matches a single numeric digit between 1 and 5, and is the same as saying ^[1-5]$.
Matches	1 | 2 | 4
Non-Matches	6 | -1 | abc
Author	Rating: Not yet rated. Steven Smith

Title	Test Details Pattern Title
Expression	^[1-5]$
Description	This matches a single numeric digit between 1 and 5, and is the same as saying ^[12345]$.
Matches	1 | 3 | 4
Non-Matches	6 | 23 | a
Author	Rating: Steven Smith

Title	Test Details Pattern Title
Expression	foo
Description	The "hello world" of regular expressions, this will match any string with an instance of 'foo' in it.
Matches	foo
Non-Matches	bar
Author	Rating: Steven Smith

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 Email - Overly Simple
Expression	^\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,3}$
Description	Simple email expression. Doesn't allow numbers in the domain name and doesn't allow for top level domains that are less than 2 or more than 3 letters (which is fine until they allow more). Doesn't handle multiple "." in the domain ([email protected]).
Matches	[email protected] | [email protected] | [email protected]
Non-Matches	[email protected] | [email protected] | [email protected]
Author	Rating: Steven Smith

Title	Test Details Strongish Password
Expression	^[a-zA-Z]\w{3,14}$
Description	The password's first character must be a letter, it must contain at least 4 characters and no more than 15 characters and no characters other than letters, numbers and the underscore may be used
Matches	abcd | aBc45DSD_sdf | password
Non-Matches	afv | 1234 | reallylongpassword
Author	Rating: Not yet rated. Steven Smith