Regular Expressions 101

Order By

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

Community Patterns

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 - 8 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 - 8 months ago (Last modified 8 months ago)
1

Contraction-inclusive Word Pattern

PCRE2 (PHP >=7.3)
This regex will take both regular words and contractions
Submitted by anonymous - 8 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 - 8 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 - 8 months ago
1

Match Ports

PCRE2 (PHP >=7.3)
Match all Ports except 20,21,23,137,1378,139
Submitted by anonymous - 8 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 - 8 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 - 8 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 - 8 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 - 8 months ago (Last modified 8 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 - 8 months ago
1

Markdown images with preview

PCRE2 (PHP >=7.3)
Markdown Images with preview
Submitted by anonymous - 8 months ago (Last modified 8 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 - 8 months ago
1

semver 2.0.0 regex (named groups)

PCRE2 (PHP >=7.3)
Semver 2.0.0 rwith named groups for those systems that support them (PCRE [Perl Compatible Regular Expressions, i.e. Perl, PHP and R], Python and Go). Source: https://semver.org/
Submitted by Soma Szelpal - 8 months ago (Last modified 8 months ago)
1

Semver 2.0.0 (with numbered capture groups)

PCRE2 (PHP >=7.3)
Semver 2.0.0 with numbered capture groups instead (so cg1 = major, cg2 = minor, cg3 = patch, cg4 = prerelease and cg5 = buildmetadata) that is compatible with ECMA Script (JavaScript), PCRE (Perl Compatible Regular Expressions, i.e. Perl, PHP and R), Python and Go. Source: https://semver.org/
Submitted by Soma Szelpal - 8 months ago
1

password regex (strict)

ECMAScript (JavaScript)
Synopsis The subject password must fullfill several criterias to ensure it's have an acceptable level of minimal security. Success criterias contains at least 1 number (0-9) contains at least 1 uppercase letters...
Submitted by Soma Szelpal - 8 months ago (Last modified 8 months ago)
1

Match function declerations in python

Python
This regex will match function declerations in python
Submitted by danielnachumdev - 8 months ago
1...809810811812813...902

Community Library Entry

1

Regular Expression
ECMAScript (JavaScript)

/
^(?=.*\d)(?=.*[A-Z])(?=.*[a-z])(?=.*[^\w\d\s:])([^\s]){8,16}$
/
gm
Open regex in editor

Description

Synopsis

The subject password must fullfill several criterias to ensure it's have an acceptable level of minimal security.

Success criterias

  • contains at least 1 number (0-9)
  • contains at least 1 uppercase letters
  • contains at least 1 lowercase letters
  • contains at least 1 non-alpha numeric number
  • password is 8-16 characters without whitespaces (space, tab, newline)
Submitted by Soma Szelpal - 8 months ago (Last modified 8 months ago)