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Title |
Test
Details
Pattern Title
|
Expression |
^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$ |
Description |
Email validator that adheres directly to the specification for email address naming. It allows for everything from ipaddress and country-code domains, to very rare characters in the username. |
Matches |
|
Non-Matches |
joe | @foo.com | a@a |
Author |
Rating:
Andy Smith
|
Title |
Test
Details
Pattern Title
|
Expression |
((\(\d{3}\) ?)|(\d{3}-))?\d{3}-\d{4} |
Description |
US Phone Number -- doesn't check to see if first digit is legal (not a 0 or 1). |
Matches |
(123) 456-7890 | 123-456-7890 |
Non-Matches |
1234567890 |
Author |
Rating:
Not yet rated.
Steven Smith
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Title |
Test
Details
Pattern Title
|
Expression |
[\w-]+@([\w-]+\.)+[\w-]+ |
Description |
Yet another simple email validator expression. |
Matches |
|
Non-Matches |
asdf | 1234 |
Author |
Rating:
Steven Smith
|
Title |
Test
Details
Pattern Title
|
Expression |
\d{4}-?\d{4}-?\d{4}-?\d{4} |
Description |
Major credit card validator. Only checks that the format is 16 digits (optionally separated by hyphens), not the value of any of the digits. |
Matches |
1234-1234-1234-1234 | 1234123412341234 |
Non-Matches |
1234123412345 |
Author |
Rating:
Steven Smith
|
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:
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 |
^(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
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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 |
\(([0-9]{2}|0{1}((x|[0-9]){2}[0-9]{2}))\)\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
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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 |
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Non-Matches |
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Author |
Rating:
Not yet rated.
Eric Lebetsamer
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Title |
Test
Details
Pattern Title
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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
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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 |
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Non-Matches |
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Author |
Rating:
Justin Saunders
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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
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Title |
Test
Details
Pattern Title
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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 |
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Non-Matches |
word | word@ | @word |
Author |
Rating:
Gregory Beamer
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Title |
Test
Details
Pattern Title
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Expression |
/\*[\d\D]*?\*/ |
Description |
If you need to extract or remove any /* */ sytle comments from any Java, JavaScript, C, C++, CSS, etc code you have this regular expression can help. |
Matches |
/* my comment */ | /* my multiline comment */ | /* my nested comment */ |
Non-Matches |
*/ anything here /* | anything between 2 seperate comments | \* *\ |
Author |
Rating:
Chris Craft
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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 $5.12 fails |
Author |
Rating:
Not yet rated.
Bob Levittan
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Title |
Test
Details
Pattern Title
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Expression |
\b(([01]?\d?\d|2[0-4]\d|25[0-5])\.){3}([01]?\d?\d|2[0-4]\d|25[0-5])\b |
Description |
Most Concise RegExp for matching Decimal IPs. If nothing else, it'll make your code easier to read. (And I know that \d?\d is \d{1,2} but that's 2 extra characters.)
--Update: darkone noticed 8 characters could be shaved down. I've edited it to reflect this. Thanks, darkone! |
Matches |
217.6.9.89 | 0.0.0.0 | 255.255.255.255 |
Non-Matches |
256.0.0.0 | 0978.3.3.3 | 65.4t.54.3 |
Author |
Rating:
Sean Schricker
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Title |
Test
Details
Pattern Title
|
Expression |
(AUX|PRN|NUL|COM\d|LPT\d)+\s*$ |
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
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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
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Title |
Test
Details
Pattern Title
|
Expression |
^\D?(\d{3})\D?\D?(\d{3})\D?(\d{4})$ |
Description |
This RegEx requires a US phone number WITH area code. It is written to all users to enter whatever delimiters they want or no delimiters at all (i.e. 111-222-3333, or 111.222.3333, or (111) 222-3333, or 1112223333, etc...). |
Matches |
(111) 222-3333 | 1112223333 | 111-222-3333 |
Non-Matches |
11122223333 | 11112223333 | 11122233333 |
Author |
Rating:
Laurence O'Donnell
|
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