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

/
/
gxm

Test String

Code Generator

Generated Code

#include <StringConstants.au3> ; to declare the Constants of StringRegExp #include <Array.au3> ; UDF needed for _ArrayDisplay and _ArrayConcatenate Local $sRegex = "(?xm)^=((?<component>[^ ]*(SUPERVISOR))|(?<severity>[^ ]*(INFO))).*\s+(?<time>[^ =]*)\s+[=]*\n(?<message>(?s)^(.*?)(?:(?:\r*\n){2}))" Local $sString = "=SUPERVISOR REPORT==== 5-Jul-2017::14:10:58 ===" & @CRLF & _ " Supervisor: {<0.15737.0>,amqp_channel_sup_sup}" & @CRLF & _ " Context: shutdown_errorhttps://regex101.com/r/QpRINz/1/tests" & @CRLF & _ " Reason: shutdown" & @CRLF & _ " Offender: [{nb_children,1}," & @CRLF & _ " {name,channel_sup}," & @CRLF & _ " {mfargs," & @CRLF & _ " {amqp_channel_sup,start_link," & @CRLF & _ " [direct,<0.15736.0>," & @CRLF & _ " <<"<rabbit@rabbitmq-default-Control.3.15736.0>">>]}}," & @CRLF & _ " {restart_type,temporary}," & @CRLF & _ " {shutdown,brutal_kill}," & @CRLF & _ " {child_type,supervisor}]" & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:03 ===" & @CRLF & _ "Starting RabbitMQ 3.4.4 on Erlang 17.5.6" & @CRLF & _ "Copyright (C) 2007-2014 GoPivotal, Inc." & @CRLF & _ "Licensed under the MPL. See http://www.rabbitmq.com/" & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:03 ===" & @CRLF & _ "node : rabbit@rabbitmq-default-Control" & @CRLF & _ "home dir : /var/lib/rabbitmq" & @CRLF & _ "config file(s) : /etc/rabbitmq/rabbitmq.config" & @CRLF & _ "cookie hash : jlzhQcHOuBZ03iv7GFo/pQ==" & @CRLF & _ "log : /var/log/rabbitmq/rabbit@rabbitmq-default-Control.log" & @CRLF & _ "sasl log : /var/log/rabbitmq/rabbit@rabbitmq-default-Control-sasl.log" & @CRLF & _ "database dir : /var/lib/rabbitmq/mnesia/rabbit@rabbitmq-default-Control" & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:05 ===" & @CRLF & _ "Limiting to approx 65436 file handles (58890 sockets)" & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:05 ===" & @CRLF & _ "Memory limit set to 58079MB of 145198MB total." & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:05 ===" & @CRLF & _ "Disk free limit set to 50MB" & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:05 ===" & @CRLF & _ "msg_store_transient: using rabbit_msg_store_ets_index to provide index" & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:05 ===" & @CRLF & _ "msg_store_persistent: using rabbit_msg_store_ets_index to provide index" & @CRLF & _ "" & @CRLF & _ "=WARNING REPORT==== 24-Jul-2017::08:44:05 ===" & @CRLF & _ "msg_store_persistent: rebuilding indices from scratch" & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:05 ===" & @CRLF & _ "started TCP Listener on 10.60.2.90:5672" & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:05 ===" & @CRLF & _ "accepting AMQP connection <0.4941.0> (10.60.2.82:47767 -> 10.60.2.90:5672)" & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:05 ===" & @CRLF & _ "accepting AMQP connection <0.4949.0> (10.60.2.82:47768 -> 10.60.2.90:5672)" & @CRLF & _ "" & @CRLF & _ "=INFO REPORT==== 24-Jul-2017::08:44:05 ===" & @CRLF & _ "accepting AMQP connection <0.4952.0> (10.60.2.82:47769 -> 10.60.2.90:5672)" & @CRLF & _ "" & @CRLF & _ "=SUPERVISOR REPORT==== 5-Jul-2017::23:11:58 ===" & @CRLF & _ " Supervisor: {<0.23464.1>,amqp_channel_sup_sup}" & @CRLF & _ " Context: shutdown_error" & @CRLF & _ " Reason: shutdown" & @CRLF & _ " Offender: [{nb_children,1}," & @CRLF & _ " {name,channel_sup}," & @CRLF & _ " {mfargs," & @CRLF & _ " {amqp_channel_sup,start_link," & @CRLF & _ " [direct,<0.23463.1>," & @CRLF & _ " <<"<rabbit@rabbitmq-default-Control.3.23463.1>">>]}}," & @CRLF & _ " {restart_type,temporary}," & @CRLF & _ " {shutdown,brutal_kill}," & @CRLF & _ " {child_type,supervisor}]" & @CRLF & _ "" & @CRLF & _ "=SUPERVISOR REPORT==== 6-Jul-2017::06:20:58 ===" & @CRLF & _ " Supervisor: {<0.22665.2>,amqp_channel_sup_sup}" & @CRLF & _ " Context: shutdown_error" & @CRLF & _ " Reason: shutdown" & @CRLF & _ " Offender: [{nb_children,1}," & @CRLF & _ " {name,channel_sup}," & @CRLF & _ " {mfargs," & @CRLF & _ " {amqp_channel_sup,start_link," & @CRLF & _ " [direct,<0.22664.2>," & @CRLF & _ " <<"<rabbit@rabbitmq-default-Control.3.22664.2>">>]}}," & @CRLF & _ " {restart_type,temporary}," & @CRLF & _ " {shutdown,brutal_kill}," & @CRLF & _ " {child_type,supervisor}]" & @CRLF & _ "" Local $aArray = StringRegExp($sString, $sRegex, $STR_REGEXPARRAYGLOBALFULLMATCH) Local $aFullArray[0] For $i = 0 To UBound($aArray) -1 _ArrayConcatenate($aFullArray, $aArray[$i]) Next $aArray = $aFullArray ; Present the entire match result _ArrayDisplay($aArray, "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 AutoIt, please visit: https://www.autoitscript.com/autoit3/docs/functions/StringRegExp.htm