Regular Expressions 101

Order By

Sponsors
There are currently no sponsors. Become a sponsor today!

Community Patterns

1

Missing opening bracket

PCRE2 (PHP >=7.3)
Flags the missing opening bracket.
Submitted by anonymous - 9 months ago
1

INI Parser

.NET 7.0 (C#)
This regular expression has the following features that make it a convenient tool for working with text data. (?=\S) Positive lookahead, trims leading whitespace in text block. (? ... ) Group for text block, which can be comment, section, entry, or undefined string. (? ... ) Group for comment. Incl...
Submitted by Pavel Bashkardin - 9 months ago (Last modified 4 months ago)
1

Date regex

PCRE2 (PHP >=7.3)
Date regex
Submitted by anonymous - 9 months ago
1

T-SQL find comments in script

PCRE2 (PHP >=7.3)
Converts the outcome from an SQL Agent Log (one liner) to multi lines, for easy read
Submitted by Paw Jershauge - 9 months ago (Last modified 9 months ago)
1

T-SQL find comments in script

.NET 7.0 (C#)
Finds the comments in a t-sql (tsql) script
Submitted by Paw Jershauge - 9 months ago
1

T-SQL find text blocks in script

PCRE2 (PHP >=7.3)
Finds the text blocks in a t-sql (tsql) script
Submitted by Paw Jershauge - 9 months ago
1

first

PCRE2 (PHP >=7.3)
good
Submitted by anonymous - 9 months ago
1

Even or uneven

PCRE2 (PHP >=7.3)
matches if the string is an even integer
Submitted by Holz - 9 months ago
1

Number Expr

ECMAScript (JavaScript)
A "raw" expression matching numbers; anything from a simple 123 to -123,456.78e90 will be matched. Note: this may be vulnerable to ReDoS attacks when long multiline entries are available & a few hundered (or thousand depending on the length of the input) steps is a problem; check the Regex Debugger...
Submitted by expo.moe - 9 months ago (Last modified 9 months ago)
1

Contraction-inclusive Word Pattern

PCRE2 (PHP >=7.3)
This regex will take both regular words and contractions
Submitted by anonymous - 9 months ago
1

Schaefer atlas extract labels

PCRE2 (PHP >=7.3)
Extract information about hemisphere and region name from Schaefer atlas labels. Personally I use this for nilearn.datasets.fetch_atlas_schaefer_2018 function where I access the labels property of the resulting variable, but you do you.
Submitted by Julia Marcinkowska - 9 months ago
1

Simple EIN (Employee Identification Number) format

ECMAScript (JavaScript)
An Employer Identification Number (EIN) is also known as a Federal Tax Identification Number, and is used to identify a business entity. Generally, businesses need an EIN. It expects 2 digits at start, then a dash ('-') and then 7 digits. No assumptions regarding the allowed prefixes, etc.
Submitted by @uazure - 9 months ago
1

Match Ports

PCRE2 (PHP >=7.3)
Match all Ports except 20,21,23,137,1378,139
Submitted by anonymous - 9 months ago
1

IsNumeric Test

PCRE2 (PHP >=7.3)
Tests for any value that can be converted to a T-SQL numeric type.
Submitted by Noel Cruz - 9 months ago
1

Match verbose, comma delimited, 64-bit hexadecimal, as sent by an ESP32 via the DallasTemperature getAddress method, for DS18B20 temperature sensors.

PCRE2 (PHP >=7.3)
Match a verbose, comma delimited, 64-bit hexadecimal, as sent by an ESP32, via the DallasTemperature getAddress method, for a DS18B20 temperature sensor. Used in Google Sheets, or Excel, Data Validation, after copying and pasting the input string from the Serial Monitor. The ESP32 interrogates the...
Submitted by CharlesMartel732 - 9 months ago
1

Renamer Log file to CSV

PCRE (PHP <7.3)
Catches our log files renamed file names and adds them to CSV file
Submitted by anonymous - 9 months ago
1

Iraqi phone number validation regular expression (RegEx)

PCRE2 (PHP >=7.3)
It must be 10 or 11 digits (with optional leading zero). It must start with 7 (After leading zero) Supporting 5 telecom operators: Zain Iraq (079, 078) Asiacell (077) Korek Telecom (075)...
Submitted by Areeb Al-Quraishi - 9 months ago (Last modified 9 months ago)
1

potential react or next component names from folder name

PCRE2 (PHP >=7.3)
this regex can be used to generate a potential component name out of a folder name NEXT js complient
Submitted by Jean Luc Emmanuel VERHANNEMAN - 9 months ago
1

Markdown images with preview

PCRE2 (PHP >=7.3)
Markdown Images with preview
Submitted by anonymous - 9 months ago (Last modified 9 months ago)
1

Search users

PCRE2 (PHP >=7.3)
Wyszukuje użytkowników według imienia lub nazwiska lub imienia i nazwiska. Jeżeli na początku nie ma spacji i jest tylko jedno słowo, to szukane jest po imie. Jeżeli na początku jest spacja i jest tylko 1 słowo, to szukane jest według nazwiska. Jeśli są tylko 2 słowa, pierwsze słowo to imię, a drugi...
Submitted by Mykhailo Hulii - 9 months ago
1...348349350351352...902

Community Library Entry

1

Regular Expression
PCRE2 (PHP >=7.3)

/
(?(DEFINE) (?<tagnames> @CUSTOM-AT-1 | @CUSTOM-AT-2) (?<number> -? (?= [1-9]|0(?!\d) ) \d+ (\.\d+)? ([eE] [+-]? \d+)? ) (?<boolean> true | false | null ) (?<string> \" ([^\"\\\\]* | \\\\ [\"\\\\bfnrt\/] | \\\\ u [0-9a-f]{4} )* \" ) (?<array> \[ (?: (?&json) (?: , (?&json) )* )? \s* \] ) (?<pair> \s* (?&string) \s* : (?&json) ) (?<object> \{ (?: (?&pair) (?: , (?&pair) )* )? \s* \} ) (?<fieldname> [a-zA-Z0-9\_\-]+ ) (?<json> \s* (?: (?&number) | (?&boolean) | (?&string) | (?&array) | (?&object) ) ) (?<fieldlist> (?: (?&fieldname) (?: , (?&fieldname) )+ )+ ) ) (?<actiontag> (?&tagnames) ) (?:\= (?'params' (?: (?'match_list'(?&fieldlist)) | (?'match_json'(?&json)) | (?'match_string'(?:[[:alnum:]\_\-]+)) ) ) )
/
mixg
Open regex in editor

Description

A parser for actiontags (in the format of <code>@FOO=BAR or @FOO={"param":"bar"}</code>. Returns the match array with the key equal to the tag and an array containing keys of 'params, params_json and params_text'

Based on: https://regex101.com/r/fL2rM8/5

Submitted by anonymous - 9 months ago