Regular Expressions 101

Save & Share

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
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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

r"
"
gm

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

const regex = new RegExp('(?i)((\\bfoll[\\wá-ú]{4,10})|(\\bfoll([aeéoó][nsdr]?(?=[^\\wáé])))|(\\bfoll(?:([eéaá][ibsrdo][\\wáé])))|(folleta))', 'gm') const str = `follándonoslas, follándonoslos, follándonosla, follándonoslo, follándomelos, follándotelos, follándomelas, follándotelas, follándooslas, follándooslos, folletinescos, folletinescas, follándoselos, follándoselas, folletinistas, follándosela, follándoosla, follándoselo, follándotelo, follándotela, folletinesca, folletinesco, folletinista, follándooslo, follándomela, follárnoslos, follándomelo, follárnoslas, follándolos, follándoles, folletistas, follaríamos, follándolas, follándonos, follárnoslo, follárselos, follároslos, follármelas, follártelas, follárnosla, follárselas, follártelos, follármelos, follároslas, folloneras, folletones, follárselo, follársela, follándose, folletista, follártela, follábamos, follártelo, folloneros, follonería, follándola, follándote, folláramos, follándoos, folláremos, follármela, follármelo, follásemos, follárosla, follándome, follároslo, follándolo, follándole, folletines, folladoras, folladores, follaríais, follaremos, follajería, follasteis, follonero, folladora, follarlas, follonera, follaréis, follarais, follarían, follarlos, follareis, follarnos, follarles, folladnos, follarías, folliscas, follabais, folladles, folletero, folladlas, folladlos, follaseis, folladla, follaban, follaren, follares, follarla, folladas, follador, follabas, follaras, folladlo, follados, follando, follamos, follajes, folladme, folladle, follaran, follarlo, follarme, follones, follarás, folletón, follaste, follases, follasen, follisca, folletín, folletos, follaría, follonía, follarse, follarse, follarte, follarle, follemos, follarán, follaron, follaros, folléis, folleto, follase, follero, folleta, follaba, follada, follará, follado, follare, follaré, folláis, follaje, follara, follaos, follen, folles, follad, follar, follan, follas, follón, follo, folle, follé, folla, folló.`; const subst = ``; // The substituted value will be contained in the result variable const result = str.replace(regex, subst); console.log('Substitution result: ', result);

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