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
No Match

/
/
gm

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

#include <MsgBoxConstants.au3> ; to declare the Constants of MsgBox Local $sRegex = "(?m)(?i)^(?!((<\/|<)(h[1-6]|ul|li|script|blockquote)(\s.+)*>))(.+)(?!(<(\/\3)>))$" Local $sString = "<h2>Lorem ipsum dolor sit amet, consectetur adipiscing elit</h2>" & @CRLF & _ "" & @CRLF & _ "Vivamus vel tempor turpis, <strong>non rutrum quam</strong>. Suspendisse ac rhoncus felis, eget porta lectus. " & @CRLF & _ "" & @CRLF & _ "Nam vulputate sapien risus, vel vehicula mi volutpat sed. " & @CRLF & _ "" & @CRLF & _ "<ul>" & @CRLF & _ "<li>Sed feugiat nibh at nisl eleifend scelerisque.</li>" & @CRLF & _ "<li>Aliquam non maximus ipsum. Aliquam erat volutpat.</li>" & @CRLF & _ "</ul>" & @CRLF & _ "" & @CRLF & _ "<h3>Praesent eget diam sit amet leo vehicula sagittis at quis tortor</h3>" & @CRLF & _ "" & @CRLF & _ "Nunc nec sem ac nunc tincidunt aliquam ut nec dolor. Nulla facilisi." & @CRLF & _ "" & @CRLF & _ "<img alt="xxxx" src="xxx.png" class="xxxxx"/> " & @CRLF & _ "" & @CRLF & _ "<caption><i>ccccc</i></caption> " & @CRLF & _ "" & @CRLF & _ "<img alt="xxxx" src="xxx.png" class="xxxxx"/> " & @CRLF & _ "" & @CRLF & _ "<i>ccccc</i>" & @CRLF & _ "" & @CRLF & _ "<strong>Nunc nec sem ac nunc tincidunt aliquam ut nec dolor. Nulla facilisi.</strong>" & @CRLF & _ "" & @CRLF & _ "Vivamus vel tempor turpis, <strong>non rutrum quam</strong>. Suspendisse ac rhoncus felis, eget porta lectus." & @CRLF & _ "" & @CRLF & _ "Nunc nec" & @CRLF & _ "Nunc nec" & @CRLF & _ "Nunc nec" & @CRLF & _ "" & @CRLF & _ "<blockquote class="twitter-tweet" data-lang="en"><p lang="en" dir="ltr">Vivamus vel tempor turpis <a href=""></a></p>&mdash; xxxxx (@xxxxxx) <a href="https://twitter.com/xxxx/status/x?ref_src=x">February 15, 2019</a></blockquote>" & @CRLF & _ "" & @CRLF & _ "<script async src="" charset="utf-8"></script>" Local $sSubst = "<p>$5</p>" Local $sResult = StringRegExpReplace($sString, $sRegex, $sSubst) MsgBox($MB_SYSTEMMODAL, "Result", $sResult)

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