Regular Expressions 101

Save & Share

  • Regex Version: ver. 2
  • 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

Substitution

Processing...

Code Generator

Language

Generated Code

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r"(?m)^.+ (?:full|incr|manual) .+? (.+?) .*").unwrap(); let string = "rspedw03.corpads.local 3085876532 JC_UNIX_FS01_INCR_DD2 JC_FS_DD2 UNIX_FS01_INCR_DD2 incr 02/23/2022 03/29/2022 03/29/2022 disk 1645592426 backup 3013 MB JCBDD2301P.CORPADS.LOCAL rsuedw01.corpads.local 1020344 JC_DB_DB2 JC_DB Clone_DR full 02/23/2022 04/04/2022 04/04/2022 disk 1645592431 Clone_DR 997 KB MNBDD3302P.corpads.local rsuedw01.corpads.local 1020344 JC_DB_DB2 full 02/23/2022 04/04/2022 03/30/2022 disk 1645592431 997 KB JCBDD1300P.corpads.local rsuedw03.corpads.local 12608 MN_UNIX_NP_7_Days MN_DB Clone_DR full 02/23/2022 04/21/2022 04/21/2022 disk 1645592432 Clone_DR 13 KB JCBDD1300P.corpads.local "; let substitution = "$1"; // result will be a String with the substituted value let result = regex.replace_all(string, substitution); println!("{}", 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 Rust, please visit: https://docs.rs/regex/latest/regex/