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
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 = "\\d{1,9}(eur.*)? honoraires? exclus"; final String string = "----------------------------------------------------------------------------------\n" + "[REGEX_1 = hors honoraires?:? (:\\s)?\\d{1,9}]\n" + "----------------------------------------------------------------------------------\n" + "prix hors honoraires 900 000 €. no\n" + "prix hors honoraire 900 000 €. no\n" + "prix hors honoraire: 900 000 €. no\n" + "prix hors honoraires 168 000 € ttc.\n" + "prix hors honoraires 600 000 € ht. \n" + "prix hors honoraires 125 000 €. no\n" + "prix hors honoraires 2 500 000 € pa\n" + "prix hors honoraires 100 000 €. no\n" + "prix hors honoraires 250 000 € h\n" + "prix hors honoraires: 250 000 € h\n" + "prix de vente hors honoraires : 620 000 €\n\n" + "----------------------------------------------------------------------------------\n" + "[REGEX_2 = \\d{1,9} ([a-zA-Z_\\/€²]{1,12}) hors honoraires?]\n" + "----------------------------------------------------------------------------------\n" + "1 050 000 € hors honoraires\n" + "450 000 euros hors honoraires\n" + "287600 eur hors honoraires\n" + "450 ht/hc/m²/an hors honoraires\n" + "450 € /m2 ht/hc/an hors honoraires\n" + "450 m²/an/ ht hc et hors honoraires\n\n" + "----------------------------------------------------------------------------------\n" + "[REGEX_3 = \\d{1,9}(eur.*)? hors honoraires?]\n" + "----------------------------------------------------------------------------------\n" + "65 000 hors honoraires \n" + "400000eur hors honoraires \n\n" + "----------------------------------------------------------------------------------\n" + "[REGEX_4 = honoraires? exclus:? (:\\s)?\\d{1,9}]\n" + "----------------------------------------------------------------------------------\n" + "prix honoraires exclus : 80 000 eur\n" + "prix honoraires exclus : 550 000 eur\n" + "prix honoraires exclus: 550 000 eur\n\n" + "----------------------------------------------------------------------------------\n" + "[REGEX_5 = \\d{1,9} ([a-zA-Z_\\/€²]{1,12}) honoraires? exclus]\n" + "----------------------------------------------------------------------------------\n" + "65 000 eur honoraires exclus\n" + "400000 ht/hc/m²/an honoraires exclus\n\n" + "----------------------------------------------------------------------------------\n" + "[REGEX_6 = \\d{1,9}(eur.*)? honoraires? exclus]\n" + "----------------------------------------------------------------------------------\n" + "65 000 honoraires exclus\n" + "400000eur ht/hc/m²/an honoraires exclus\n" + "400000eur honoraires exclus\n\n" + "[GOOD ONE]\n" + "prix honoraires exclus \n" + "honoraires exclus \n" + "prix hors honoraires \n" + "bail 30/06/22 hors honoraires\n\n"; 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