Regular Expressions 101

Save & Manage Regex

  • Current Version: 1
  • 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

Code Generator

Language

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"\""Id\"":""(\d+)"",""LocalTime"":""(\d+)"""; string input = @"2020-06-05 01:00:33.919 INFO [Thread-261246][HClient.java:256] - post successefully 2020-06-05 01:00:33.920 INFO [Thread-261246][HClient.java:257] - {""ResponseStatusListObject"":{""ResponseStatusObject"":[{""RequestURL"":""/VIID/Faces"",""StatusCode"":""0"",""StatusMessage"":""正常"",""Id"":""31010713011328005232"",""LocalTime"":""20200605005843""}]}} 2020-06-05 01:00:33.920 INFO [Thread-261246][PutuoHandle.java:104] - list send end, listSize:6, sendTime:757ms 2020-06-05 01:00:34.160 INFO [Thread-261248][HClient.java:256] - post successefully 2020-06-05 01:00:34.160 INFO [Thread-261248][HClient.java:257] - {""ResponseStatusListObject"":{""ResponseStatusObject"":[{""RequestURL"":""/VIID/Faces"",""StatusCode"":""0"",""StatusMessage"":""正常"",""Id"":""31010712011328005082"",""LocalTime"":""20200605010212""}]}} 2020-06-05 01:00:34.196 INFO [Thread-261247][HClient.java:256] - post successefully 2020-06-05 01:00:34.196 INFO [Thread-261247][HClient.java:257] - {""ResponseStatusListObject"":{""ResponseStatusObject"":[{""RequestURL"":""/VIID/Faces"",""StatusCode"":""0"",""StatusMessage"":""正常"",""Id"":""31010712011328005082"",""LocalTime"":""20200605010240""}]}} 2020-06-05 01:00:34.196 INFO [Thread-261247][PutuoHandle.java:104] - list send end, listSize:5, sendTime:954ms 2020-06-05 01:00:34.323 INFO [Thread-261248][HClient.java:256] - post successefully 2020-06-05 01:00:34.323 INFO [Thread-261248][HClient.java:257] - {""ResponseStatusListObject"":{""ResponseStatusObject"":[{""RequestURL"":""/VIID/Faces"",""StatusCode"":""0"",""StatusMessage"":""正常"",""Id"":""31010713011328005232"",""LocalTime"":""20200605005843""}]}} 2020-06-05 01:00:34.510 INFO [Thread-261248][HClient.java:256] - post successefully 2020-06-05 01:00:34.510 INFO [Thread-261248][HClient.java:257] - {""ResponseStatusListObject"":{""ResponseStatusObject"":[{""RequestURL"":""/VIID/Faces"",""StatusCode"":""0"",""StatusMessage"":""正常"",""Id"":""31010711011328005078"",""LocalTime"":""20200605010240""}]}} 2020-06-05 01:00:34.510 INFO [Thread-261248][PutuoHandle.java:104] - list send end, listSize:5, sendTime:1464ms 2020-06-05 01:00:48.939 INFO [Timer-0][PutuoHandleThread.java:29] - area=>PT_AREA cameraType=>HK_TP groupCount=>3 2020-06-05 01:00:48.939 INFO [Timer-0][DbUtil.java:118] - getLastMaxId, cameraType:HK_TP, area:PT_AREA 2020-06-05 01:00:48.940 INFO [Timer-0][DbUtil.java:129] - sql=SELECT maxid FROM t_flag_info WHERE cameraType = ? AND area = ?, 1:HK_TP, 2:PT_AREA"; RegexOptions options = RegexOptions.Multiline; foreach (Match m in Regex.Matches(input, pattern, options)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx