Regular Expressions 101

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Community Patterns

1

Words that are only sequences of Chemical Element Symbols, allowing smushes

PCRE2 (PHP >=7.3)
This will match only words that include chemical elements: H + Og + W + Ar + Ts but not Eton. It allows internal overlap: LaG = La + Ag, and allows the first letter or last letter to be the end/start of a symbol to allow chaining. You can easily remove the various pieces, though. A single-line (non...
Submitted by mrflip - 4 hours ago (Last modified 3 hours ago)
1

Validate a comma separated list of IPv4 addresses, CIDRs, or IPv4 Ranges like 1.1.1.1-1.1.1.10

Golang
Simple Regex to *validate * (no extraction!) an IPv4 Range which can be a comma separated mixture of IPv4 addresses IPv4 CIDRs IPv4 Ranges like 1.1.1.1-1.1.1.10 Examples : ...
Submitted by alucab - 5 days ago
1

MobaXterm SSH session dump data

PCRE2 (PHP >=7.3)
Below regex pattern help to extract needful information from Portable export of SSH sessions. Although not complete, can help data extraction from export file.
Submitted by anonymous - 9 days ago
1

Russian phone number (российские номера телефонов)

PCRE2 (PHP >=7.3)
A regular expression for searching for phone numbers in the Russian format, taking into account different ways of writing the number, including spaces, brackets and dashes. Регулярное выражение для поиска номеров телефонов Российского формата. Учитывает написание номера через пробел, скобки, тире и ...
Submitted by https://t.me/ds_ivanov - 9 days ago
1

Match the web URL

PCRE2 (PHP >=7.3)
Match the web URL, like https://xxx.com or xxx.com, not matching the email or the ip address
Submitted by Hughie - 10 days ago
1

96 Bit Decryption

PCRE2 (PHP >=7.3)
Part 2 of my post.
Submitted by Dave Cummins - 11 days ago
1

96 Bit Encryption

PCRE2 (PHP >=7.3)
96 Bit encryption by using a library. Possible to extend this beyond 96 if you have the time! Look at my other post to see how to decrypt. Based on using a library of values.
Submitted by Dave Cummins - 11 days ago
1

Chemical equation one side

PCRE2 (PHP >=7.3)
Matches one side of a chemical equation. So for ` 2HCl + 2Na → 2NaCl + H2 ` it would match each side individually with one newline between each 2HCl + 2Na and 2NaCl + H2
Submitted by viktorashi - 13 days ago
1

Antimony CRN definition

PCRE2 (PHP >=7.3)
Describes how the first few lines of an Antimony (for Tellurium) CRN definition should look like
Submitted by viktorashi - 13 days ago
1

Trim Slashes

PCRE2 (PHP >=7.3)
Remove leading and trailing slashes
Submitted by anonymous - 20 days ago
1

SELECT

PCRE2 (PHP >=7.3)
/^select\s+(?.+?)\s+from\s+(?\S+)\s*(?:where\s+(?[\d\w= ><!]+))?;?$/gmi
Submitted by anonymous - 22 days ago
1

regex for mobile numbers

PCRE2 (PHP >=7.3)
regex to validate mobile numbers all over the world
Submitted by anonymous - 23 days ago
1

Firsname with all latin characters, hyphen and single quote

PCRE2 (PHP >=7.3)
Allowing all firsnames written with Latin text like Björn or D'Mariüsz
Submitted by ali benabdelaziz - a month ago
1

YouTube Regex 2024+

PCRE2 (PHP >=7.3)
Tested in 2024 with various share/embed methods on YouTube video page
Submitted by doseofted - a month ago
1

ISO 8601 DURATION - Terraform Validation

Golang
This is made to validate an ISO 8601 input in a Terraform variable validation block: validation { condition = can(regex("^P(\\d+Y)?(\\d+M)?(\\d+D)?(T(\\d+H)?(\\d+M)?(\\d+S)?)?$", var.value)) error_message = "The value must be a valid ISO 8601 duration string representing time. (e.g. PT...
Submitted by anonymous - a month ago
1

Validación de un nombre o un apellido

PCRE2 (PHP >=7.3)
Antonio-Marcos O'Higgins González
Submitted by Pablo - a month ago
1

RUT chileno sin puntos

PCRE2 (PHP >=7.3)
15000000-9
Submitted by Pablo - a month ago
1

RUT chileno con puntos

PCRE2 (PHP >=7.3)
15.000.000-9
Submitted by Pablo - a month ago
1

Número de motor

PCRE2 (PHP >=7.3)
ABC123DEF12A
Submitted by Pablo - a month ago
1

Teléfono chileno

PCRE2 (PHP >=7.3)
912345678 ó +56912345678 ó 56912345678
Submitted by Pablo - a month ago
123...146

Community Library Entry

1

Regular Expression
PCRE2 (PHP >=7.3)

/
^(P((?<numYears>[1-9]+[0-9]*)Y)?((?<numMonths>[1-9]+[0-9]*)M)?((?<numDays>[1-9]+[0-9]*)D)?(T((?<numHours>[1-9]+[0-9]*)H)?((?<numMinutes>[1-9]+[0-9]*)M)?((?<numSeconds>[1-9]+[0-9]*)S)?)?|P(?<numWeeks>[1-9]+[0-9]*)W)$
/
gm
Open regex in editor

Description

Duration regular expression as per https://en.wikipedia.org/wiki/ISO_8601 PnYnMnDTnHnMnS or PnW

Examples: P1Y1M1DT1H1M1S P1M - 1 month PT1M - 1 minute P1MT1M - 1 month and 1 minute P1W - 1 week P1D - 1 day PT2S - 2 seconds

Submitted by Sharath Malladi - 7 months ago (Last modified 7 months ago)