Regular Expressions 101

Save & Manage Regex

  • Current Version: 26
  • Save & Share
  • Community Library

Flavor

  • PCRE2 (PHP)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java
  • .NET 7.0 (C#)
  • Rust
  • PCRE (Legacy)
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests
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
  • 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
Processing...

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)[\r\n]+").unwrap(); let string = "#EXTINF:-1 tvg-name=\"seedocs\" tvg-logo=\"RT\",RT http://rt.ashttp14.visionip.tv/live/rt-global-live-HD/playlist.m3u8 #EXTINF:-1 tvg-name=\"hsn\" tvg-logo=\"hsn\",HSN TV rtsp://hsn.mpl.miisolutions.net:1935/hsn-live01/_definst_/mp4:420p500kB31 #EXTINF:-1 tvg-name=\"us\" tvg-logo=\"us\",USTwit http://bglive-a.bitgravity.com/twit/live/high #EXTINF:-1 tvg-name=\"ALJAZEERA\" tvg-logo=\"aljazeera\",Aljazeera rtmp://aljazeeraflashlivefs.fplive.net/aljazeeraflashlive-live/aljazeera_eng_high #EXTINF:-1 tvg-name=\"bbc\" tvg-logo=\"bbc\",BBC World News #EXTINF:-1 tvg-name=\"vevo\" tvg-logo=\"vevo\",Vevo http://vevoplaylist-live.hls.adaptive.level3.net/vevo/ch1/06/prog_index.m3u8 #EXTINF:-1 tvg-name=\"vevo2\" tvg-logo=\"vevo2\",Vevo 2 http://vevoplaylist-live.hls.adaptive.level3.net/vevo/ch3/06/prog_index.m3u8 #EXTINF:-1 tvg-name=\"1HD\" tvg-logo=\"1HD\",1HD rtmp://109.239.142.62/live/livestream3"; let substitution = "\\n"; // 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/