Regular Expressions 101

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Community Patterns

2

Mobile Number Regex

PCRE2 (PHP >=7.3)
The following regex validates international mobile numbers
Submitted by anonymous - 3 years ago
2

Email Extractor

PCRE2 (PHP >=7.3)
([a-zA-Z0-9.-]+@[a-zA-Z0-9.-]+\.[a-zA-Z0-9_-]+)
Submitted by Kashif - 3 years ago
2

yyyy/mm/dd

Java 8
^(((\d{3}[1-9]|\d{2}[1-9]\d|\d[1-9]\d{2}|[1-9]\d{3})(\/)(((0[13578]|1[02])(\/)(0[1-9]|[12]\d|3[01]))|((0[469]|11)(\/)(0[1-9]|[12]\d|30))|(02(\/)(0[1-9]|[1]\d|2[0-8]))))|(((\d{2})(0[48]|2468|13579)|((0[48]|2468|3579)00))(\/)02(\/)29))$ Match year/month/day, date format. E.g: 2021/08/25 [match] 2021/...
Submitted by mayl0421 - 3 years ago
2

Html tag parser

PCRE2 (PHP >=7.3)
This regex will help you to parse html tag. Example ...
Submitted by denchiklut - 3 years ago
2

JavaScript semicolon adder

ECMAScript (JavaScript)
This is a regex to use on JavaScript code that is missing semicolons
Submitted by samunemeth - 3 years ago
2

Check Phone numbers

PCRE2 (PHP >=7.3)
Other patterns
Submitted by https://joserobinson.com - 3 years ago
2

Match Javanese Script Syllable

PCRE2 (PHP >=7.3)
Match any syllable based on javanese script unicode
Submitted by anonymous - 3 years ago (Last modified 3 years ago)
2

RFC1918 - Private IPv4 addresses

PCRE2 (PHP >=7.3)
Validate a given IP v4 address against all three defined Private IPv4 Subnets as statet in RFC1918 10.0.0.0/8 172.16.0.0/20 192.168.0.0/16 ...
Submitted by 0100101101001 - 3 years ago
2

Get commands from Neebula Discovery Language NDL

ECMAScript (JavaScript)
Matches the commands from Neebula Discovery Language NDL, which is used in ServiceNow Discovery Patterns.
Submitted by James Griffith - 3 years ago (Last modified 3 years ago)
2

Grabify URL Detector

PCRE2 (PHP >=7.3)
Detects any Grabify IP tracker links
Submitted by ShadowNox - 3 years ago
2

UUID 4

PCRE2 (PHP >=7.3)
Detects any UUID 4 strings
Submitted by ShadowNox - 3 years ago
2

CSS Colors: RGB(A), HSL(A), HEX(3,4,6,8), var(--tw-color), etc...

ECMAScript (JavaScript)
Versatile, multiline matching of CSS colors of many common formats, including: [x] HEX-3: #123 (equivalent to #112233) [x] HEX-4: #FA0F ( ... #FFAA00FF) [x] HEX-6: #FF3300 ( ...#F30) [x] HEX-8: #FFAA00FF ( ...#FA0F)...
Submitted by Nicholas Berlette (@nberlette) - 3 years ago
2

Svelte: CSS class attribute (Svelte or HTML friendly), class:directive, TailwindCSS classes, and @apply.

ECMAScript (JavaScript)
SvelteComponent Class Directive Matching Also supports TailwindCSS-style @apply directive for the class value. class:directive={boolean} ...
Submitted by Nicholas Berlette (@nberlette) - 3 years ago
2

GitHub bare url to org/repo Markdown

PCRE2 (PHP >=7.3)
Convert a bare url into organization/repo format in a Markdown link.
Submitted by anonymous - 3 years ago
2

Markdown Heading

Java 8
Parses the text following a '#' and a space all the way up to the next return character. Additional #'s can be added for parsing of other type of headings!
Submitted by Hansen - 3 years ago
2

Simple URL

ECMAScript (JavaScript)
Validate an URL input.
Submitted by @nuragic - 3 years ago
2

Currency with dollar sign, two decimals, negative allowed, starting with period ok

ECMAScript (JavaScript)
Currency with dollar sign, two decimals, negative allowed, starting with period ok
Submitted by Natalia Zolotareva - 3 years ago
2

Extract parts of a URL on Python

Python
Extract parts of a URL on Python
Submitted by dixanms - 3 years ago
2

regex101.com id grabber

PCRE (PHP <7.3)
Grabs the ID for the regex101.com permalink to code.
Submitted by Sasha Garan - 3 years ago (Last modified 3 years ago)
2

Lua Enhanced: +=

Python
Adds += to Lua.
Submitted by anonymous - 3 years ago
1...878879880881882...902

Community Library Entry

2

Regular Expression
PCRE (PHP <7.3)

/
^ (?=[-+]?(?:0\B)*+(\d*?)((?:(?=\d+(?:\.\d+)?\ [-+]?(?:0\B)*+(\d*?)(\d(?(4)\4))(?:\.\d+)?\ [-+]?(?:0\B)*+(\d*?)(\d(?(6)\6))(?:\.\d+)?$)\d)++)\b) (?: (?=-\S*\ -\S*\ -|(?!.*-)) [-+]?(?:0\B)*+ (?= (?(?!\1\.?(?!(?!(?&a)))) (?=\S+\ \S+\ [-+]?0*\1\3\6(?:\.\d+)?$) | (?(?!.*+\3)\S+\ [-+]?(?:0\B)*) (?=\d*?(\2|\4)\b(.*?\ [-+]?(?:0\B)*)\S+$) (?(?=9*\7\b) (?:9(?=\d*?\8[1](\g{-1}?+0)))*? \7\8[1]\g{-1}?+\6\b | (?:(\d)(?=\d*\8(\g{-1}?+\g{-2})))*+ (?=\d(\d*\8\g{-2}?+)) (?=0\g{-1}1|1\g{-1}2|2\g{-1}3|3\g{-1}4|4\g{-1}5|5\g{-1}6|6\g{-1}7|7\g{-1}8|8\g{-1}9) \d (?:9(?=\d*\8\g{-2}?+\d(\g{-1}?+0)))*? \7\8\g{-3}?+\d\g{-1}?+\6\b ) ) ) \1 (?: (?=\.?(\d)\S*\ [-+]?(?:0\B)*+\3((\g{-2}?+\.?)\d)\S*\ [-+]?(?:0\B)*+\5((\g{-2}?+\.?)\d)) \.? (?(?=(?! \14\.? (?<a> (?: (?=\d\.?\d(?<b>\S*?\ [-+]?(?:0\B)*\3\15?+)((\g{-2}?+\.?)\d)) (?=\d(\S*?\g{-4}\g{-2})) (?=0\g{-1}9|1\g{-1}8|2\g{-1}7|3\g{-1}6|4\g{-1}5|5\g{-1}4|6\g{-1}3|7\g{-1}2|8\g{-1}1|9\g{-1}0) \d\.?(?=\S*?(\g{-5}\g{-4})) )*+ (?=\d(\g{-2}\.?|(?&b)\.?)) (?=[5-9]\g{-1}[5-9]|1\g{-1}9|2\g{-1}[89]|3\g{-1}[7-9]|4\g{-1}[6-9]|6\g{-1}4|7\g{-1}[34]|8\g{-1}[2-4]|9\g{-1}[1-4]) ){0} (?&a) )) (?=\d(\S*\ [-+]?(?:0\B)*\3\16)\d(\S*\ [-+]?(?:0\B)*\5\18)) (?= 1\g{-2}(?:1\g{-1}2|2\g{-1}3|3\g{-1}4|4\g{-1}5|5\g{-1}6|6\g{-1}7|7\g{-1}8|8\g{-1}9|9\g{-1}0) |2\g{-2}(?:1\g{-1}3|2\g{-1}4|3\g{-1}5|4\g{-1}6|5\g{-1}7|6\g{-1}8|7\g{-1}9|8\g{-1}0|9\g{-1}1) |3\g{-2}(?:1\g{-1}4|2\g{-1}5|3\g{-1}6|4\g{-1}7|5\g{-1}8|6\g{-1}9|7\g{-1}0|8\g{-1}1|9\g{-1}2) |4\g{-2}(?:1\g{-1}5|2\g{-1}6|3\g{-1}7|4\g{-1}8|5\g{-1}9|6\g{-1}0|7\g{-1}1|8\g{-1}2|9\g{-1}3) |5\g{-2}(?:1\g{-1}6|2\g{-1}7|3\g{-1}8|4\g{-1}9|5\g{-1}0|6\g{-1}1|7\g{-1}2|8\g{-1}3|9\g{-1}4) |6\g{-2}(?:1\g{-1}7|2\g{-1}8|3\g{-1}9|4\g{-1}0|5\g{-1}1|6\g{-1}2|7\g{-1}3|8\g{-1}4|9\g{-1}5) |7\g{-2}(?:1\g{-1}8|2\g{-1}9|3\g{-1}0|4\g{-1}1|5\g{-1}2|6\g{-1}3|7\g{-1}4|8\g{-1}5|9\g{-1}6) |8\g{-2}(?:1\g{-1}9|2\g{-1}0|3\g{-1}1|4\g{-1}2|5\g{-1}3|6\g{-1}4|7\g{-1}5|8\g{-1}6|9\g{-1}7) |9\g{-2}(?:1\g{-1}0|2\g{-1}1|3\g{-1}2|4\g{-1}3|5\g{-1}4|6\g{-1}5|7\g{-1}6|8\g{-1}7|9\g{-1}8) |0\g{-2}(\d)\g{-2}\g{-1} |(\d)\g{-4}0\g{-3}\g{-1} ) | (?=\d((?-5))\d((?-5))) (?= 1\g{-2}(?:0\g{-1}2|1\g{-1}3|2\g{-1}4|3\g{-1}5|4\g{-1}6|5\g{-1}7|6\g{-1}8|7\g{-1}9|8\g{-1}0|9\g{-1}1) |2\g{-2}(?:0\g{-1}3|1\g{-1}4|2\g{-1}5|3\g{-1}6|4\g{-1}7|5\g{-1}8|6\g{-1}9|7\g{-1}0|8\g{-1}1|9\g{-1}2) |3\g{-2}(?:0\g{-1}4|1\g{-1}5|2\g{-1}6|3\g{-1}7|4\g{-1}8|5\g{-1}9|6\g{-1}0|7\g{-1}1|8\g{-1}2|9\g{-1}3) |4\g{-2}(?:0\g{-1}5|1\g{-1}6|2\g{-1}7|3\g{-1}8|4\g{-1}9|5\g{-1}0|6\g{-1}1|7\g{-1}2|8\g{-1}3|9\g{-1}4) |5\g{-2}(?:0\g{-1}6|1\g{-1}7|2\g{-1}8|3\g{-1}9|4\g{-1}0|5\g{-1}1|6\g{-1}2|7\g{-1}3|8\g{-1}4|9\g{-1}5) |6\g{-2}(?:0\g{-1}7|1\g{-1}8|2\g{-1}9|3\g{-1}0|4\g{-1}1|5\g{-1}2|6\g{-1}3|7\g{-1}4|8\g{-1}5|9\g{-1}6) |7\g{-2}(?:0\g{-1}8|1\g{-1}9|2\g{-1}0|3\g{-1}1|4\g{-1}2|5\g{-1}3|6\g{-1}4|7\g{-1}5|8\g{-1}6|9\g{-1}7) |8\g{-2}(?:0\g{-1}9|1\g{-1}0|2\g{-1}1|3\g{-1}2|4\g{-1}3|5\g{-1}4|6\g{-1}5|7\g{-1}6|8\g{-1}7|9\g{-1}8) |9\g{-2}(?:0\g{-1}0|1\g{-1}1|2\g{-1}2|3\g{-1}3|4\g{-1}4|5\g{-1}5|6\g{-1}6|7\g{-1}7|8\g{-1}8|9\g{-1}9) |0\g{-2}(?:0\g{-1}1|1\g{-1}2|2\g{-1}3|3\g{-1}4|4\g{-1}5|5\g{-1}6|6\g{-1}7|7\g{-1}8|8\g{-1}9|9\g{-1}0) ) ) \d )++ (?: (?:\.0+)?0*\ [-+]?0*\3\15(?:\.0+)?0*\ [-+]?0*\5\17(?:\.0+)?0*$ | \ [-+]?0*\3\15(\.?\d*?)0*\ [-+]?0*\5\17\g{-1}(?:\.0+)?0*$ | (\.?\d*?)0*\ [-+]?0*\3\15\ [-+]?0*\5\17\g{-1}(?:\.0+)?0*$ | \.? (?: (?=\d\d((?&b))((\g{-2}?+\.?)\d)) (?=\d(\S*?\g{-4}\g{-2})) (?=0\g{-1}9|1\g{-1}8|2\g{-1}7|3\g{-1}6|4\g{-1}5|5\g{-1}4|6\g{-1}3|7\g{-1}2|8\g{-1}1|9\g{-1}0) \d (?=\S*?(\g{-5}(\g{-5}))) )*+ (?=\d(\g{-3}|(?&b)\.?)) (?=1\g{-1}9|2\g{-1}8|3\g{-1}7|4\g{-1}6|5\g{-1}5|6\g{-1}4|7\g{-1}3|8\g{-1}2|9\g{-1}1) \d0*\ [-+]?0*\3\15\g{-2}?+\.?\d0*\ [-+]?0*\5\17\.?0*$ ) | (?=-(?!.*-)|[^-]\S*\ -\S*\ -) [-+]?(?:0\B)*+ (?= (?(?!\1\.?(?!(?!(?&c)))) (?=\S+\ [-+]?0*\1\5\4\b) | (?| (?!.++\5) \S+\ [-+]?(?:0\B)*+(?=\S*(\ [-+]?(?:0\B)*+)()) (?(?=\S*\41[9]*\6\b) 1(?:0(?=\S*\41(\g{-1}?+9)))*? \4\b\S*\41\g{-1}?+\6\b | (?:(\d)(?=\S*\41(\g{-1}?+\g{-2})))*+ (?=\d(\S*\41\g{-2}?+))(?=1\g{-1}0|2\g{-1}1|3\g{-1}2|4\g{-1}3|5\g{-1}4|6\g{-1}5|7\g{-1}6|8\g{-1}7|9\g{-1}8) \d (?:0(?=\S*\41\g{-2}?+\d(\g{-1}?+9)))*? \4\b\S*\41\g{-3}?+\d\g{-1}?+\6\b ) | (?=.*+\5) (?=\d*?(\2)\b(\S*\ [-+]?(?:0\B)*+)) (?(?=9*\41\b) (?:9(?=\d*?\42[1](\g{-1}?+0)))*? \41\42[1]\g{-1}?+\4\b | (?:(\d)(?=\d*\42(\g{-1}?+\g{-2})))*+ (?=\d(\d*\42\g{-2}?+)) (?=0\g{-1}1|1\g{-1}2|2\g{-1}3|3\g{-1}4|4\g{-1}5|5\g{-1}6|6\g{-1}7|7\g{-1}8|8\g{-1}9) \d (?:9(?=\S*\42\g{-2}?+\d(\g{-1}?+0)))*? \41\42\g{-3}?+\d\g{-1}?+\4\b ) ) ) ) \1 (?: (?=\.?(\d)\S*\ [-+]?(?:0\B)*+\3((\g{-2}?+\.?)\d)\S*\ [-+]?(?:0\B)*+\5((\g{-2}?+\.?)\d)) \.? (?(?=(?! \48\.? (?<c> (?: (?=\d\.?\d(?<d>\S*?\ \S+\ [-+]?(?:0\B)*\5\51?+)((\g{-2}?+\.?)\d)) (?=\d(\S*?\g{-4}\g{-2})) (?=0\g{-1}9|1\g{-1}8|2\g{-1}7|3\g{-1}6|4\g{-1}5|5\g{-1}4|6\g{-1}3|7\g{-1}2|8\g{-1}1|9\g{-1}0) \d\.?(?=\S*?(\g{-5}\g{-4})) )*+ (?=\d(\g{-2}\.?|(?&d)\.?)) (?=[5-9]\g{-1}[5-9]|1\g{-1}9|2\g{-1}[89]|3\g{-1}[7-9]|4\g{-1}[6-9]|6\g{-1}4|7\g{-1}[34]|8\g{-1}[2-4]|9\g{-1}[1-4]) ){0} (?&c) )) (?=\d(\S*\ [-+]?(?:0\B)*\3\50)\d(\S*\ [-+]?(?:0\B)*\5\52)) (?= 1\g{-2}(?:2\g{-1}1|3\g{-1}2|4\g{-1}3|5\g{-1}4|6\g{-1}5|7\g{-1}6|8\g{-1}7|9\g{-1}8|0\g{-1}9) |2\g{-2}(?:3\g{-1}1|4\g{-1}2|5\g{-1}3|6\g{-1}4|7\g{-1}5|8\g{-1}6|9\g{-1}7|0\g{-1}8|1\g{-1}9) |3\g{-2}(?:4\g{-1}1|5\g{-1}2|6\g{-1}3|7\g{-1}4|8\g{-1}5|9\g{-1}6|0\g{-1}7|1\g{-1}8|2\g{-1}9) |4\g{-2}(?:5\g{-1}1|6\g{-1}2|7\g{-1}3|8\g{-1}4|9\g{-1}5|0\g{-1}6|1\g{-1}7|2\g{-1}8|3\g{-1}9) |5\g{-2}(?:6\g{-1}1|7\g{-1}2|8\g{-1}3|9\g{-1}4|0\g{-1}5|1\g{-1}6|2\g{-1}7|3\g{-1}8|4\g{-1}9) |6\g{-2}(?:7\g{-1}1|8\g{-1}2|9\g{-1}3|0\g{-1}4|1\g{-1}5|2\g{-1}6|3\g{-1}7|4\g{-1}8|5\g{-1}9) |7\g{-2}(?:8\g{-1}1|9\g{-1}2|0\g{-1}3|1\g{-1}4|2\g{-1}5|3\g{-1}6|4\g{-1}7|5\g{-1}8|6\g{-1}9) |8\g{-2}(?:9\g{-1}1|0\g{-1}2|1\g{-1}3|2\g{-1}4|3\g{-1}5|4\g{-1}6|5\g{-1}7|6\g{-1}8|7\g{-1}9) |9\g{-2}(?:0\g{-1}1|1\g{-1}2|2\g{-1}3|3\g{-1}4|4\g{-1}5|5\g{-1}6|6\g{-1}7|7\g{-1}8|8\g{-1}9) |0\g{-2}(\d)\g{-2}\g{-1} |(\d)\g{-4}\g{-1}\g{-3}0 ) | (?=\d((?-5))\d((?-5))) (?= 1\g{-2}(?:2\g{-1}0|3\g{-1}1|4\g{-1}2|5\g{-1}3|6\g{-1}4|7\g{-1}5|8\g{-1}6|9\g{-1}7|0\g{-1}8|1\g{-1}9) |2\g{-2}(?:3\g{-1}0|4\g{-1}1|5\g{-1}2|6\g{-1}3|7\g{-1}4|8\g{-1}5|9\g{-1}6|0\g{-1}7|1\g{-1}8|2\g{-1}9) |3\g{-2}(?:4\g{-1}0|5\g{-1}1|6\g{-1}2|7\g{-1}3|8\g{-1}4|9\g{-1}5|0\g{-1}6|1\g{-1}7|2\g{-1}8|3\g{-1}9) |4\g{-2}(?:5\g{-1}0|6\g{-1}1|7\g{-1}2|8\g{-1}3|9\g{-1}4|0\g{-1}5|1\g{-1}6|2\g{-1}7|3\g{-1}8|4\g{-1}9) |5\g{-2}(?:6\g{-1}0|7\g{-1}1|8\g{-1}2|9\g{-1}3|0\g{-1}4|1\g{-1}5|2\g{-1}6|3\g{-1}7|4\g{-1}8|5\g{-1}9) |6\g{-2}(?:7\g{-1}0|8\g{-1}1|9\g{-1}2|0\g{-1}3|1\g{-1}4|2\g{-1}5|3\g{-1}6|4\g{-1}7|5\g{-1}8|6\g{-1}9) |7\g{-2}(?:8\g{-1}0|9\g{-1}1|0\g{-1}2|1\g{-1}3|2\g{-1}4|3\g{-1}5|4\g{-1}6|5\g{-1}7|6\g{-1}8|7\g{-1}9) |8\g{-2}(?:9\g{-1}0|0\g{-1}1|1\g{-1}2|2\g{-1}3|3\g{-1}4|4\g{-1}5|5\g{-1}6|6\g{-1}7|7\g{-1}8|8\g{-1}9) |9\g{-2}(?:0\g{-1}0|1\g{-1}1|2\g{-1}2|3\g{-1}3|4\g{-1}4|5\g{-1}5|6\g{-1}6|7\g{-1}7|8\g{-1}8|9\g{-1}9) |0\g{-2}(?:1\g{-1}0|2\g{-1}1|3\g{-1}2|4\g{-1}3|5\g{-1}4|6\g{-1}5|7\g{-1}6|8\g{-1}7|9\g{-1}8|0\g{-1}9) ) ) \d )++ (?: (?:\.0+)?0*\ [-+]?0*\3\49(?:\.0+)?0*\ [-+]?0*\5\51(?:\.0+)?0*$ | \ [-+]?0*\3\49(\.?\d*?)0*\ [-+]?0*\5\51\g{-1}(?:\.0+)?0*$ | (\.?\d*?)0*\ [-+]?0*\3\49\g{-1}(?:\.0+)?0*\ [-+]?0*\5\51$ | \.? (?: (?=\d\d((?&d))((\g{-2}?+\.?)\d)) (?=\d(\S*?\g{-4}\g{-2})) (?=0\g{-1}9|1\g{-1}8|2\g{-1}7|3\g{-1}6|4\g{-1}5|5\g{-1}4|6\g{-1}3|7\g{-1}2|8\g{-1}1|9\g{-1}0) \d (?=\S*?(\g{-5}(\g{-5}))) )*+ (?=\d(\g{-3}|(?&d)\.?)) (?=1\g{-1}9|2\g{-1}8|3\g{-1}7|4\g{-1}6|5\g{-1}5|6\g{-1}4|7\g{-1}3|8\g{-1}2|9\g{-1}1) \d0*\ [-+]?0*\3\49\.?0*\ [-+]?0*\5\51\g{-2}?+\.?\d0*$ ) | (?=[^-]\S*\ -\S*\ [^-]\S*|-\S*\ [^-]\S*\ -) [-+]?(?:0\B)*+ (?= (?(?!\S+\ [-+]?(?:0\B)*+\3\.?(?!(?!(?&e)))) (?=\3\5\2\b) | (?=\d*(\S*\ (?(?=.*+\3)\S+\ )[-+]?(?:0\B)*+)\d*?(\4|\6)\b) (?(?=10*\2\b) 1(?:0(?=\d*\75(\g{-1}?+9)))*? \2\b\75\g{-1}?+\76\b | (?:(\d)(?=\d*\75(\g{-1}?+\g{-2})))*+ (?=\d(\d*\75\g{-2}?+)) (?=1\g{-1}0|2\g{-1}1|3\g{-1}2|4\g{-1}3|5\g{-1}4|6\g{-1}5|7\g{-1}6|8\g{-1}7|9\g{-1}8) \d (?:0(?=\d*\75\g{-2}?+\d(\g{-1}?+9)))*? \2\b\75\g{-3}?+\d\g{-1}?+\76\b ) ) ) \1 (?: (?=\.?(\d)\S*\ [-+]?(?:0\B)*+\3((\g{-2}?+\.?)\d)\S*\ [-+]?(?:0\B)*+\5((\g{-2}?+\.?)\d)) \.? (?(?=(?! \S*\ [-+]?(?:0\B)*+\3\83\.? (?<e> (?: (?=\d\.?\d(?<f>\S*?\ [-+]?(?:0\B)*\5\85?+)((\g{-2}?+\.?)\d)) (?=\d(\S*?\g{-4}\g{-2})) (?=0\g{-1}9|1\g{-1}8|2\g{-1}7|3\g{-1}6|4\g{-1}5|5\g{-1}4|6\g{-1}3|7\g{-1}2|8\g{-1}1|9\g{-1}0) \d\.? (?=\S*?(\g{-5}\g{-4})) )*+ (?=\d(\g{-2}\.?|(?&f)\.?)) 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/
gmx
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Submitted by anonymous - 6 years ago