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Title	Test Details Pattern Title
Expression	^\d{3}-\d{2}-\d{4}$
Description	This regular expression will match a hyphen-separated Social Security Number (SSN) in the format NNN-NN-NNNN.
Matches	333-22-4444 | 123-45-6789
Non-Matches	123456789 | SSN
Author	Rating: Not yet rated. 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	^[a-zA-Z0-9\-\.]+\.(com|org|net|mil|edu|COM|ORG|NET|MIL|EDU)$
Description	Domain names: This regular expression tests the validity of a domain or hostname. It will match any valid domain name that does not contain characters which are invalid in URLs, and which ends in .com, .org, .net, .mil, or .edu. You can add additional valid TLDs by appending the | (pipe) character and the desired TLD to the list in the parens.
Matches	3SquareBand.com | asp.net | army.mil
Non-Matches	$SquareBand.com | asp/dot.net | army.military
Author	Rating: Not yet rated. G. Andrew Duthie

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	((mailto\:|(news|(ht|f)tp(s?))\://){1}\S+)
Description	Regular Expression matches any internet URLs. Used with the replace method it comes in very handy.
Matches	http://www.aspemporium.com | mailto:[email protected] | ftp://ftp.test.com
Non-Matches	www.aspemporium.com | [email protected] | bloggs
Author	Rating: Justin Saunders

Title	Test Details Pattern Title
Expression	^[\w\.=-]+@[\w\.-]+\.[\w]{2,3}$
Description	Much simpler email expression. This one forces a length of 2 or 3, which fits current specs, but you may need to alter the end as this one allows all numerals on the .COM section.
Matches	[email protected] | [email protected] | [email protected]
Non-Matches	word | word@ | @word
Author	Rating: Gregory Beamer

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	^(user=([a-z0-9]+,)*(([a-z0-9]+){1});)?(group=([a-z0-9]+,)*(([a-z0-9]+){1});)?(level=[0-9]+;)?$
Description	This re was used for a security routine. The format is: [user=name1,name2,...,nameN;][group=group1,group2,...,groupN;][level=number;] Each component is optional, but they must appear the in order listed if applicable.
Matches	user=foo,bar,quux;group=manager,admin;level=100; | group=nobody;level=24;
Non-Matches	user=foo | blahh
Author	Rating: Not yet rated. Michael Scovetta

Title	Test Details Pattern Title
Expression	^([\w\d\-\.]+)@{1}(([\w\d\-]{1,67})|([\w\d\-]+\.[\w\d\-]{1,67}))\.(([a-zA-Z\d]{2,4})(\.[a-zA-Z\d]{2})?)$
Description	This pattern allows standard e-mail addresses (e.g. [email protected]), sub domains (e.g. [email protected]), the new two- and four-letter domains (e.g. [email protected] and [email protected]) and country codes (e.g. [email protected]). Also, this patter follows the Network Solutions standard length of 67 characters for top-level domains. The reason I allow numbers to be entered in the domain suffix is for future planning. If you do not want numbers to be able to be added as a domain suffix (e.g. [email protected]), simply delete the last two occurrences of "\d".
Matches	[email protected] | [email protected] | [email protected]
Non-Matches	[email protected] | [email protected] | foo@[email protected]
Author	Rating: Not yet rated. Laurence O'Donnell

Title	Test Details Pattern Title
Expression	^(\d{4}[- ]){3}\d{4}|\d{16}$
Description	Credit card validator. Just checks that the format is either 16 numbers in groups of four separated by a "-" or a " " or nothing at all.
Matches	1234-1234-1234-1234 | 1234 1234 1234 1234 | 1234123412341234
Non-Matches	Visa | 1234 | 123-1234-12345
Author	Rating: Not yet rated. Steven Smith

Title	Test Details Pattern Title
Expression	^((4\d{3})|(5[1-5]\d{2})|(6011))-?\d{4}-?\d{4}-?\d{4}|3[4,7]\d{13}$
Description	Matches major credit cards including: Visa (length 16, prefix 4), Mastercard (length 16, prefix 51-55), Discover (length 16, prefix 6011), American Express (length 15, prefix 34 or 37). All 16 digit formats accept optional hyphens (-) between each group of four digits.
Matches	6011-1111-1111-1111 | 5423-1111-1111-1111 | 341111111111111
Non-Matches	4111-111-111-111 | 3411-1111-1111-111 | Visa
Author	Rating: Steven Smith

Title	Test Details Pattern Title
Expression	^[A-Z0-9]{8}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{4}-[A-Z0-9]{12}$
Description	GUID Tester. It tests SQL Server GUIDs, which are alphanumeric characters grouped 8-4-4-4-12 (with the dashes). Make sure they don't have the brackets around them before you check them and have fun!
Matches	4D28C5AD-6482-41CD-B84E-4573F384BB5C | B1E1282C-A35C-4D5A-BF8B-7A3A51D9E388 | 91036A4A-A0F4-43F0-8CD
Non-Matches	{B1E1282C-A35C-4D3A-BF8B-7A3A51D9E388} | AAAAAAAAAAAAAAAAA | B;E1282C-A35C-4D3A-BF8B-7A3A51D9E38
Author	Rating: Not yet rated. James Bray

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	\[link="(?<link>((.|\n)*?))"\](?<text>((.|\n)*?))\[\/link\]
Description	This can be used in conjunction with the replace method to provide pseudo-code support without having to enable HTML. The replacement string (in ASP.NET, use RegExp.Replace(SourceString, RegularExpressionPattern, ReplacementString) is &lt;a href=&quot;${link}&quot;&gt;${text}&lt;/a&gt;.
Matches	[link="http://www.yahoo.com"]Yahoo[/link]
Non-Matches	[link]http://www.yahoo.com[/link] | [link=http://www.yahoo.com]Yahoo[/link]
Author	Rating: Not yet rated. Ryan S

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	^\$?([0-9]{1,3},([0-9]{3},)*[0-9]{3}|[0-9]+)(.[0-9][0-9])?$
Description	Matches currency input with or without commas.
Matches	$3,023,123.34 | 9,876,453 | 123456.78
Non-Matches	4,33,234.34 | $1.234 | abc
Author	Rating: Brian Orrell

Title	Test Details Pattern Title
Expression	<[^>]*\n?.*=("|')?(.*\.jpg)("|')?.*\n?[^<]*>
Description	Match any image insert in a tag . simply replace the .jpg in the pattern whit a variable of content type ex:.swf,.js,.gif and loop the pattern to retrieve all tag whit the contenttype pass trought.... Very useful when you have people uploading html document in your site and you want to retrieve all dependecy.
Matches	<td background="../img/img.jpg" > | <img src=img.jpg > | <img src='img.jpg'
Non-Matches	= img.jpg | img.jpg
Author	Rating: Not yet rated. Marc-Antoine Latour

Title	Test Details Pattern Title
Expression	^http\://[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(/\S*)?$
Description	Verifies URLs. Checks for the leading protocol, a good looking domain (two or three letter TLD; no invalid characters in domain) and a somwhat reasonable file path.
Matches	http://psychopop.org | http://www.edsroom.com/newUser.asp | http://unpleasant.jarrin.net/markov/inde
Non-Matches	ftp://psychopop.org | http://www.edsroom/ | http://un/pleasant.jarrin.net/markov/index.asp
Author	Rating: Klaxon Mindjammer