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

const regex = /\d{6}\s*([^\t]*?)\s*\t\s*([^\t]*)\s*s0(\d{6})@htw-berlin.de.*/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('\\d{6}\\s*([^\\t]*?)\\s*\\t\\s*([^\\t]*)\\s*s0(\\d{6})@htw-berlin.de.*', 'gm') const str = ` Nr MtkNr Name Vorname Email Studiengang Fachsemester Status 1: 546254 Adiputro Axel Ferris s0546254@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 7 angemeldet 2: 560996 Rachmatullah Fathoni s0560996@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 6 angemeldet 3: 561110 Shcherban Oksana s0561110@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 10 angemeldet 4: 569153 Wanat Philipp s0569153@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 6 angemeldet 5: 572928 Staats Martin s0572928@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 7 angemeldet 6: 573033 Trinh Quynh Vi Ngoc s0573033@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 angemeldet 7: 574074 Baliev Krist s0574074@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 3 angemeldet 8: 575428 Seidel Richard s0575428@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 angemeldet 9: 575695 Valentin Leonard s0575695@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 angemeldet 10: 575730 Schuldt Jonah-Sophie s0575730@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 angemeldet 11: 575754 Blank Maximilian s0575754@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 angemeldet 12: 575868 Klingberg Paul s0575868@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 angemeldet 13: 576962 Strecker Ralf s0576962@htw-berlin.de Master IMI (M) H Wintersem. 2016 3 angemeldet 14: 540347 Redanz René s0540347@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 zugelassen 15: 549481 Müller Nadja s0549481@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 15 zugelassen 16: 550246 Ramadhan Irfan s0550246@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 7 zugelassen 17: 562212 Haseloff Moritz s0562212@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 10 zugelassen 18: 564500 Voitel Justin s0564500@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 8 zugelassen 19: 565517 Ha Le s0565517@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 7 zugelassen 20: 565873 Al Mohamad Hasan s0565873@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 8 zugelassen 21: 566367 Baloska Diro s0566367@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 8 zugelassen 22: 568194 Kolev Dimitar s0568194@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 7 zugelassen 23: 568851 Springborn Kevin s0568851@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 7 zugelassen 24: 568927 Solihin Martin Christian s0568927@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 7 zugelassen 25: 570766 Alkhodor Salim s0570766@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 6 zugelassen 26: 571336 Hedemann Katja Gertrud s0571336@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 6 zugelassen 27: 572745 Pötsch Michelle s0572745@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 5 zugelassen 28: 572933 Siewertsen Paul s0572933@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 zugelassen 29: 573063 Unverzagt Laura Laetitia s0573063@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 5 zugelassen 30: 574153 Hahn Hendrik s0574153@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 zugelassen 31: 575518 Hintze Carolin s0575518@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 zugelassen 32: 575888 Katysheva Daria s0575888@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 7 zugelassen 33: 575923 Lüdecke Lukas Daniel s0575923@htw-berlin.de Bachelor IMI (B) H Wintersem. 2011 4 zugelassen `; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions