RegExLib.com - The first Regular Expression Library on the Web!

Title	Test Details Pattern Title
Expression	^[a-zA-Z_][a-zA-Z0-9_]*$
Description	Matches variable names/identifier from C# (and most other languages)
Matches	VariableName | i | Some_Value_3
Non-Matches	3ID | Hello World
Author	Rating: Not yet rated. Andrew Deren

Title	Test Details Roman numerials
Expression	^(?i:(?=[MDCLXVI])((M{0,3})((C[DM])|(D?C{0,3}))?((X[LC])|(L?XX{0,2})|L)?((I[VX])|(V?(II{0,2}))|V)?))$
Description	This RE validates alpha characters that evaluate to Roman numerials, ranging from 1(I) - 3999(MMMCMXCIX). Not case sensitive.
Matches	III | xiv | MCMXCIX
Non-Matches	iiV | MCCM | XXXX
Author	Rating: Not yet rated. Michael Ash

Title	Test Details Pattern Title
Expression	^(([+]\d{2}[ ][1-9]\d{0,2}[ ])|([0]\d{1,3}[-]))((\d{2}([ ]\d{2}){2})|(\d{3}([ ]\d{3})*([ ]\d{2})+))$
Description	Swedish phone numbers according to SIS standard
Matches	+46 8 123 456 78 | 08-123 456 78 | 0123-456 78
Non-Matches	+46 08-123 456 78 | 08 123 456 78 | 0123 456 78
Author	Rating: Not yet rated. Martin Henningsson

Title	Test Details Pattern Title
Expression	^\d{2}(\x2e)(\d{3})(-\d{3})?$
Description	Other expression to standard 5 digit Brazilian Postal Codes (CEP), or the CEP + 3 digits (distribution identifiers - suffix). The diference of the original one, is that the "." is mandatory.
Matches	12.345-678 | 23.345-123 | 99.999
Non-Matches	41222-222 | 3.444-233 | 43.324444
Author	Rating: Not yet rated. Rafael Miranda

Title	Test Details Pattern Title
Expression	^[A-Za-z0-9]{8}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{4}-[A-Za-z0-9]{12}$
Description	GUID Tester. This is a modification from the regular expression submitted by James Bray ([email protected]). It allows the use of mixed upper and lowercase letters in the GUID string.
Matches	BFDB4D31-3E35-4DAB-AFCA-5E6E5C8F61EA | BFDB4d31-3e35-4dab-afca-5e6e5c8f61ea
Non-Matches	qqqBFDB4D31-3E35-4DAB-AFCA-5E6E5C8F61EA | BFDB4D31-3E-4DAB-AFCA-5E6E5C8F61EA | BFDB4D31-3E35-4DAB-AF
Author	Rating: Not yet rated. V. Lorz

Title	Test Details Pattern Title
Expression	^(([a-z])+.)+[A-Z]([a-z])+$
Description	This matches Java class names such as "com.test.Test". It's being used within an XML Schema to validate classname as specified in XML documents.
Matches	com.test.Test | com.Test
Non-Matches	com.test.test | com.test.TEst | Com.test.Test
Author	Rating: Not yet rated. Matt Biggin

Title	Test Details Pattern Title
Expression	^[a-zA-Z0-9]{1,20}$
Description
Matches	e3 | wee | w4
Non-Matches	-4
Author	Rating: Not yet rated. eddie xia

Title	Test Details Pattern Title
Expression	(NOT)?(\s*\(*)\s*(\w+)\s*(=|<>|<|>|LIKE|IN)\s*(\(([^\)]*)\)|'([^']*)'|(-?\d*\.?\d+))(\s*\)*\s*)(AND|OR)?
Description	Heres my sql clause parser regexp for recordset filtering. Does recursive query parsing all by its self. Only problem I cant figure is how to match comma separated lists of quoted strings. Tell me if you figure out how! The unicodes in the re was put in by the entry form please replace them with their ascii equivalents to use it.
Matches	Aeroplane LIKE 767 | Movie LIKE 'Star' AND NOT Movie LIKE 'Trek' | Number IN (1,2,3,4,5)
Non-Matches	Hello there | A=EXCELLENT OR | B!=POOR
Author	Rating: Not yet rated. Joseph Warwick

Title	Test Details Pattern Title
Expression	^(.|\n){0,16}$
Description	Limit Length - limit the length of a text box or other area to contain any character plus new line
Matches	shorter than max
Non-Matches	string longer than max
Author	Rating: Not yet rated. David Yack

Title	Test Details Pattern Title
Expression	^((4\d{3})|(5[1-5]\d{2}))(-?|\040?)(\d{4}(-?|\040?)){3}|^(3[4,7]\d{2})(-?|\040?)\d{6}(-?|\040?)\d{5}
Description	Credit card validator for AMEX, VISA, MasterCard only. Allows spaces, dashes, or no separator between digit groups according to the layout (4-6-5 for AMEX, 4-4-4-4 for Visa and Mastercard)
Matches	3711-078176-01234 | 4123 5123 6123 7123 | 5123412361237123
Non-Matches	3711-4123-5123-6112
Author	Rating: Not yet rated. Rick Spiewak

Title	Test Details Pattern Title
Expression	^\d{5}(-\d{3})?$
Description	Matches standard 5 digit Brazilian Postal Codes (CEP), or the CEP + 3 digits (distribution identifiers - suffix). For more info refer to: http://www.correios.com.br/servicos/cep/Estrutura_CEP.cfm (in portuguese).
Matches	13165-000 | 38175-000 | 81470-276
Non-Matches	13165-00 | 38175-abc | 81470-2763
Author	Rating: Not yet rated. Carlos Nascimento

Title	Test Details Pattern Title
Expression	(.*\.([wW][mM][aA])|([mM][pP][3])$)
Description	Matches a file name to be either a .wma or .mp3 file. This can be used to check file uploads to make sure they are of a certain type. Substitute letters where appropriate for specific file types. To include more simply add logical 'or' (|) operator and append.
Matches	thisfile.mp3 | [email protected]
Non-Matches	whatever.exe | somethingelse.mpa | thisagain.wm3
Author	Rating: Not yet rated. Pete Samwel

Title	Test Details Pattern Title
Expression	[1-2][0|9][0-9]{2}[0-1][0-9][0-3][0-9][-][0-9]{4}
Description	Swedish person number. Don't work on persons older then 100 years, but they are so few that it shouldn't be a problem. Easy to fix, but I choose not to accept oldies...
Matches	19740609-7845 | 19811116-7845 | 20010913-7598
Non-Matches	21003612-9999 | 18790505-4545 | 19740641-5559
Author	Rating: Not yet rated. Tomas Axelsson

Title	Test Details AMD Athlon/Duron Codes (not Athlon 64)
Expression	^((A(((H[MX])|(M(P|SN))|(X((D[ACH])|(M[DS]))?)))?)|(K7(A)?)|(D(H[DLM])?))(\d{3,4})[ABD-G][CHJK-NPQT-Y][Q-TV][1-4][B-E]$
Description	Matches valid reference codes for AMD Athlon and Duron processors (not Athlon 64).
Matches	AXDA3200DKV4E | A1000AMT3B | D800AUT1B
Non-Matches	N/A
Author	Rating: Not yet rated. Amos Hurd

Title	Test Details Pattern Title
Expression	^[a-zA-Z]{1,2}[0-9][0-9A-Za-z]{0,1} {0,1}[0-9][A-Za-z]{2}$
Description	Matches UK postcodes according to the following rules 1. LN NLL eg N1 1AA 2. LLN NLL eg SW4 0QL 3. LNN NLL eg M23 4PJ 4. LLNN NLL eg WS14 0JT 5. LLNL NLL eg SW1N 4TB 6. LNL NLL eg W1C 8LQ Thanks to Simon Bell for informing me of LNL NLL rule for postcodes which I had omitted in an earlier version.
Matches	G1 1AA | EH10 2QQ | SW1 1ZZ
Non-Matches	G111 1AA | X10 WW | DDD 5WW
Author	Rating: Not yet rated. Dave Sparks

Title	Test Details Pattern Title
Expression	(AUX|PRN|NUL|COM\d|LPT\d)+\s*$
Description	"Be careful when opening or creating files by using Scripting File System Object. If the filename is based on the user's input, the user might attempt to open a serial port or printer."
Matches	COM1 | AUX | LPT1
Non-Matches	image.jpg | index.html | readme.txt
Author	Rating: Not yet rated. Chris Craft

Title	Test Details Pattern Title
Expression	^(?n:(?!-[\d\,]*K) (?!-((\d{1,3},)*((([3-9]\d\d|2[89]\d|27[4-9])\xB0C)|(((4[6-9]|[5-9]\d)\d)\xB0F)))) -?\d{1,3}(,\d{3})*(\xB0[CF]|K) )$
Description	Temperature scale. From ABSOLUTE ZERO up. Can use the Fahrenheit, Celsius or Kelvin Scale. The Degree symbol is required for Fahrenheit and Celsius. Numbers over 1,000 must be comma delimited.
Matches	32°F | -10°C | 4,000K
Non-Matches	-460°F | 1000°C | -1°K
Author	Rating: Not yet rated. Michael Ash

Title	Test Details Pattern Title
Expression	([2-9JQKA]|10)([\u2660\u2663\u2665\u2666])
Description	Matches each card in the deck of standard playing cards, not including the Jokers
Matches	A?A?A?A? | 2?3?4?5? | 10?J?Q?K?
Non-Matches	1? | 11? | R?
Author	Rating: Not yet rated. Michael Ash

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 A string of any US ASCII letters
Expression	^[a-zA-Z]+$
Description	Matches any string of only upper- and lower- case letters (no spaces).
Matches	abc | ABC | aBcDeF
Non-Matches	abc123 | mr. | a word
Author	Rating: Not yet rated. Steven Smith