Regular Expressions 101

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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

/
/
gm

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 = "(?m)(?i)(%(25){0,}20|\s)*(%(25){0,}24|\$)(%(25){0,}20|\s)*(%(25){0,}7B|{)(%(25){0,}20|\s)*(%(25){0,}(6A|4A)|J)(%(25){0,}(6E|4E)|N)(%(25){0,}(64|44)|D)(%(25){0,}(69|49)|I)(%(25){0,}20|\s)*(%(25){0,}3A|:)[\w\%]+(%(25){1,}3A|:)(%(25){1,}2F|\/)[^\n]+" Local $sString = "Sample Log4j strings:" & @CRLF & _ "${JNDI:LDAP://" & @CRLF & _ "${JNDI:LDAPS://" & @CRLF & _ "${JNDI:RMI://" & @CRLF & _ "${JNDI:DNS://" & @CRLF & _ "${JNDI:NIS://" & @CRLF & _ "${JNDI:IIOP://" & @CRLF & _ "${JNDI:CORBA://" & @CRLF & _ "${JNDI:NDS://" & @CRLF & _ "${JNDI:HTTPS://" & @CRLF & _ "${JNDI:HTTP://" & @CRLF & _ " $ { JNDI :LDAPS://" & @CRLF & _ " $ { JNDI :LDAPS://" & @CRLF & _ "${jNDi:l%252564ap://" & @CRLF & _ "" & @CRLF & _ "JNDI = %6A%6E%64%69" & @CRLF & _ "jndi = %4A%4E%44%49" & @CRLF & _ "" & @CRLF & _ "Multi-encoding log4j strings (without spaces):" & @CRLF & _ "%24%7B%6A%6E%64%69%3A%2F" & @CRLF & _ "%2524%257B%256A%256E%2564%2569%253A" & @CRLF & _ "%2524%257B%256A%256E%2564%2569%253A%252F" & @CRLF & _ "%252524%25257B%25256A%25256E%252564%252569%25253A%25252F" & @CRLF & _ "" & @CRLF & _ "Multi-URL Encoded string characters:" & @CRLF & _ "(?i)" & @CRLF & _ "(%(25){0,}20|\s)*" & @CRLF & _ "(%(25){0,}24|$)" & @CRLF & _ "(%(25){0,}20|\s)*" & @CRLF & _ "(%(25){0,}7B|{)" & @CRLF & _ "(%(25){0,}20|\s)*" & @CRLF & _ "(%(25){0,}(6A|4A)|J)" & @CRLF & _ "(%(25){0,}(6E|4E)|N)" & @CRLF & _ "(%(25){0,}(64|44)|D)" & @CRLF & _ "(%(25){0,}(69|49)|I)" & @CRLF & _ "(%(25){0,}20|\s)*" & @CRLF & _ "(%(25){0,}3A|:)" & @CRLF & _ "(%(25){0,}2F|\/)" & @CRLF & _ "[\w\%]+" & @CRLF & _ "(%(25){0,}3A|:)" & @CRLF & _ "(%(25){0,}2F|\/)" & @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