Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
gm

Test String

Code Generator

Language

Generated Code

import java.util.regex.Matcher; import java.util.regex.Pattern; public class Example { public static void main(String[] args) { final String regex = "\\s(?<key>[^=\\s]+)=\"(?<value>(?:<[^<>]*>|[^\"])*)"; final String string = "[2018-11-19T13:04:33.031+01:00] Bedrijfsdocument=\"BD-023005 Document\" Richting=\"Uitgaand\" Status=\"verzonden\"; Zaaknummer=\"2323343333\"; MessageID=\"ef5c6e9e-849e-4d80-af86-92fc127e7178\"; ConversationID=\"5571c03e-62a8-4fce-81ff-9fe31b7b276c\"; RefToMessageId=\"34333139343034303934303135343731\"; MMDBestand=\"2018-11-19_9bf1caf8-ca3d-43ae-b046-fa44142faa36_0_MMD.mmd\"; Bericht=\"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?><ns2:DocumentBericht BDVersie=\"2.1\" BDNaam=\"TA-022305\" xmlns:ns2=\"com.my.test/berichten/document/2\" xmlns=\"com.my.test/header/1\"><Header><ID>58b5708f-4115-462c-93f3-5fb5134c9e25</ID><VerzendendePartijen><VerzendendePartij><Volgnummer>1</Volgnummer><RegistratieveRelatiePartij><Identificatie>00000004000000034000_OTA</Identificatie><SoortRegistratie>15</SoortRegistratie></RegistratieveRelatiePartij></VerzendendePartij></VerzendendePartijen><OntvangendePartijen><OntvangendePartij><Volgnummer>1</Volgnummer><RegistratieveRelatiePartij><Identificatie>00000004000000076000_OTA</Identificatie><SoortRegistratie>15</SoortRegistratie></RegistratieveRelatiePartij></OntvangendePartij></OntvangendePartijen><Datum>2018-11-19</Datum><Tijd>13:04:32.952+01:00</Tijd><SchemaVersieID>1.1</SchemaVersieID></Header><ns2:Zaak><ns2:Identificatie>2100008418</ns2:Identificatie></ns2:Zaak><ns2:DocumentAggregatieniveaus><ns2:DocumentAggregatieniveau><ns2:Classificatie><ns2:DocumentSoort>098</ns2:DocumentSoort></ns2:Classificatie><ns2:Identificatiekenmerk>DOC006256</ns2:Identificatiekenmerk><ns2:Foldernaam>02 - Correspondentie</ns2:Foldernaam><ns2:Revisie>1</ns2:Revisie><ns2:IndicatieGewijzigdeMetadata>0</ns2:IndicatieGewijzigdeMetadata><ns2:Naam>02 - Toezenden stukken rm</ns2:Naam><ns2:Bijlage><ns2:MimeContent><ns2:MimeContentType>application/pdf</ns2:MimeContentType><ns2:MimeContentId>2018-11-19_9bf1caf8-ca3d-43ae-b046-fa44142faa36_2.pdf@my.com</ns2:MimeContentId></ns2:MimeContent></ns2:Bijlage></ns2:DocumentAggregatieniveau></ns2:DocumentAggregatieniveaus></ns2:DocumentBericht>\"; Omvang=\"3512\"\n\n\n" + "Bedrijfsdocument<=>BD-023005 Document\n" + "Richting<=>Uitgaand\n" + "Status<=>verzonden\n" + "Zaaknummer<=>2323343333\n" + "MessageID<=>ef5c6e9e-849e-4d80-af86-92fc127e7178\n" + "ConversationID<=>5571c03e-62a8-4fce-81ff-9fe31b7b276c\n" + "RefToMessageId<=>34333139343034303934303135343731\n" + "MMDBestand<=>2018-11-19_9bf1caf8-ca3d-43ae-b046-fa44142faa36_0_MMD.mmd\n" + "Bericht<=><?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\" ..... \n" + "Omvang<=>3512"; final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE); final Matcher matcher = pattern.matcher(string); while (matcher.find()) { System.out.println("Full match: " + matcher.group(0)); for (int i = 1; i <= matcher.groupCount(); i++) { System.out.println("Group " + i + ": " + matcher.group(i)); } } } }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html