Sites
Tools
Standalone tools:
Online testers:
Books
Tidbits
Sources: The above links.
- [abc] – A single character: a, b or c
- [^abc] – Any single character but a, b, or c
- [a-z] – Any single character in the range a-z
- [a-zA-Z] – Any single character in the range a-z or A-Z
- ^ – Start of line
- $ – End of line
- \A – Start of string
- \z – End of string
- . – Any single character
- \s – Any whitespace character
- \S – Any non-whitespace character
- \d – Any digit
- \D – Any non-digit
- \w – Any word character (letter, number, underscore)
- \W – Any non-word character
- \b – Any word boundary character
- (…) – Capture everything enclosed
- (a|b) – a or b
- a? – Zero or one of a
- a* – Zero or more of a
- a+ – One or more of a
- a{3} – Exactly 3 of a
- a{3,} – 3 or more of a
- a{3,6} – Between 3 and 6 of a
- ^\s[ \t]*$ – Match a blank line
- \d{2}-\d{5} – Validate an ID number consisting of 2 digits, a hyphen, and another 5 digits
Special common strings:
- Personal Name: ^[\w\.\’]{2,}([\s][\w\.\’]{2,})+$
- Username: ^[\w\d\_\.]{4,}$
- Password at least 6 symbols: ^.{6,}$
- Password or empty input: ^.{6,}$|^$
- email: ^[\_]*([a-z0-9]+(\.|\_*)?)+@([a-z][a-z0-9\-]+(\.|\-*\.))+[a-z]{2,6}$
- Email address: \b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b[A-z0-9_.%+-]+@[A-z0-9_.%+-]+\.[A-z]{2,4}
- US phone: \W?\d{3}\W?\d{3}\W?\d{4}
- US Phone number: ^\+?[\d\s]{3,}$
- US Phone with code: ^\+?[\d\s]+\(?[\d\s]{10,}$
- URL: \W?\d{3}\W?\d{3}\W?\d{4}\b\w+://(\w|-|\.|/)+(/|\b)
- US Social Security Number (SSN): \d{3}-\d{2}-\d{4}
- US ZIP: \d{5}(-\d{4})?
- IP (v4) address: \b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\b
- IP (v4) address: \b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b
- IP (v4) address: ^(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]){3}$
- IP (v4) address: \b(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b
- IP (v4) address: \b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b
- IP (v6) address:
- MAC address: ^([0-9a-fA-F][0-9a-fA-F]:){5}([0-9a-fA-F][0-9a-fA-F])$
- Positive Integers: ^\d+$
- Negative Integers: ^-\d+$
- Integer: ^-{0,1}\d+$
- Positive Number: ^\d*\.{0,1}\d+$
- Negative Number: ^-\d*\.{0,1}\d+$
- Positive Number or Negative Number: ^-{0,1}\d*\.{0,1}\d+$
- Floating point number: [-+]?([0-9]*\.[0-9]+|[0-9]+)
- Floating point number: [-+]?(?:\b[0-9]+(?:\.[0-9]*)?|\.[0-9]+\b)(?:[eE][-+]?[0-9]+\b)?
- Roman number: ^(?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)?))$
- Domain Name: ^([a-zA-Z0-9]([a-zA-Z0-9\-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,6}$
- Domain Name: ^([a-z][a-z0-9\-]+(\.|\-*\.))+[a-z]{2,6}$
- Windows File Name: (?i)^(?!^(PRN|AUX|CLOCK\$|NUL|CON|COM\d|LPT\d|\..*)(\..+)?$)[^\\\./:\*\?\”\|][^\\/:\*\?\”\|]{0,254}$
- Date in format yyyy-MM-dd: (19|20)\d\d([- /.])(0[1-9]|1[012])\2(0[1-9]|[12][0-9]|3[01])
- Date (dd mm yyyy, d/m/yyyy, etc.): ^([1-9]|0[1-9]|[12][0-9]|3[01])\D([1-9]|0[1-9]|1[012])\D(19[0-9][0-9]|20[0-9][0-9])$
- Year 1900-2099: ^(19|20)[\d]{2,2}$
Related (here at this blog):
Command line based text replace – https://eikonal.wordpress.com/2010/07/13/command-line-based-text-replace/ |
Perl online – https://eikonal.wordpress.com/2010/02/15/perl-online/