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
Processing...

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 $sRegex = "(?xi)(?:" & @CRLF & _ " <\?php" & @CRLF & _ " (?:" & @CRLF & _ " [^"'\/<\?]+" & @CRLF & _ " |" & @CRLF & _ " (?:" & @CRLF & _ " "(?:[^\\"]|\\[\s\S])*"" & @CRLF & _ " |" & @CRLF & _ " # '(?:[^\\']|\\[\s\S])*'" & @CRLF & _ " #|" & @CRLF & _ " \/\*(?:[^\*]|\*[^\/])*\*\/ " & @CRLF & _ " |" & @CRLF & _ " (?:\#|\/\/).+(?:\n|$)" & @CRLF & _ " |" & @CRLF & _ " (?:" & @CRLF & _ " <<<\s*" & @CRLF & _ " (?:" & @CRLF & _ " (?:'([a-zA-Z0-9_]+)'\s*?\n)(?:[^\n]*\n)*?\s*\1\s*?;?\s*?(?:\n|$)" & @CRLF & _ " |" & @CRLF & _ " (?:([a-zA-Z0-9_]+)\s*?\n)(?:[^\n]*\n)*?\s*\2\s*?;?\s*?(?:\n|$)" & @CRLF & _ " )" & @CRLF & _ " )" & @CRLF & _ " )" & @CRLF & _ " |" & @CRLF & _ " (?:[^?]|\?[^>])" & @CRLF & _ " )*" & @CRLF & _ " (?:\?>|$)" & @CRLF & _ ")" Local $sString = "<!--" & @CRLF & _ " The PHP masterpage" & @CRLF & _ "-->" & @CRLF & _ "<?php" & @CRLF & _ "$matches = array();" & @CRLF & _ "// separates " & @CRLF & _ "$re = <<<PREG" & @CRLF & _ " /^" & @CRLF & _ " " & @CRLF & _ " (?:\\s*(?:<!--.*?-->))*" & @CRLF & _ " <\\?php\\s*include\\s*(\\()?\\s*([\\'\\"])(?:(?!\\2).)*(?-i)Master\\.php(?i)\\2(?(-2)\\))\\s*;\\s*\\?>\\s*" & @CRLF & _ " (?:\\s*(?:<!--.*?-->))*" & @CRLF & _ " <master\\s*src=([\\'\\\"])(?<master_url>.+?)\\3\\/>(?<content>[\s\S]*)" & @CRLF & _ " $" & @CRLF & _ " /ix" & @CRLF & _ "PREG;" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ "$re = <<<PREG2" & @CRLF & _ " /^" & @CRLF & _ " " & @CRLF & _ " (?:\\s*(?:<!--.*?-->))*" & @CRLF & _ " <\\?php\\s*include\\s*(\\()?\\s*([\\'\\"])(?:(?!\\2).)*(?-i)Master\\.php(?i)\\2(?(-2)\\))\\s*;\\s*\\?>\\s*" & @CRLF & _ " (?:\\s*(?:<!--.*?-->))*" & @CRLF & _ " <master\\s*src=([\\'\\\"])(?<master_url>.+?)\\3\\/>(?<content>[\s\S]*)" & @CRLF & _ " $" & @CRLF & _ " /ix" & @CRLF & _ "PREG2;" & @CRLF & _ "" & @CRLF & _ "$raw = file_get_contents(filter_input(INPUT_SERVER, 'SCRIPT_FILENAME'));" & @CRLF & _ "preg_match($re, $raw, $matches);" & @CRLF & _ "" & @CRLF & _ "$master = file_get_contents($matches["master_url"]);" & @CRLF & _ "$child = $matches["content"];" & @CRLF & _ "" & @CRLF & _ "$child_txt = eval2str($child);" & @CRLF & _ "" & @CRLF & _ "$master_txt = eval2str($master);" & @CRLF & _ "" & @CRLF & _ "$placeholder_xml = new DOMDocument();" & @CRLF & _ "@$placeholder_xml->loadHTML($master_txt, LIBXML_NOWARNING);" & @CRLF & _ "" & @CRLF & _ "$child_xml = new DOMDocument();" & @CRLF & _ "@$child_xml->loadHTML($child_txt, LIBXML_NOWARNING);" & @CRLF & _ "" & @CRLF & _ "$child_elems = $child_xml->getElementsByTagName("content");" & @CRLF & _ "" & @CRLF & _ "" & @CRLF & _ "foreach($child_elems as $c)" & @CRLF & _ "{" & @CRLF & _ " $name = $c->getAttribute("name");" & @CRLF & _ " $child_map[$name] = $placeholder_xml->importNode($c, true);" & @CRLF & _ "}" & @CRLF & _ "" & @CRLF & _ "$placeholder_elems = $placeholder_xml->getElementsByTagName("placeholder");" & @CRLF & _ "while($placeholder_elems->length > 0)" & @CRLF & _ "{" & @CRLF & _ " $oldnode = $placeholder_elems->item(0);" & @CRLF & _ " $name = $oldnode->getAttribute("name");" & @CRLF & _ " " & @CRLF & _ " if(!isset($child_map[$name]))" & @CRLF & _ " {" & @CRLF & _ " $newnode = $placeholder_xml->createElement("content");" & @CRLF & _ " $attr = $placeholder_xml->createAttribute("name");" & @CRLF & _ " $attr->value = $name;" & @CRLF & _ " $newnode->appendChild($attr);" & @CRLF & _ " $child_map[$name] = $newnode;" & @CRLF & _ " }" & @CRLF & _ " $newnode = $child_map[$name];" & @CRLF & _ " " & @CRLF & _ " $parent = $oldnode->parentNode;" & @CRLF & _ " " & @CRLF & _ " $parent->replaceChild($newnode, $oldnode);" & @CRLF & _ " $placeholder_elems = $placeholder_xml->getElementsByTagName("placeholder"); // " & @CRLF & _ "}" & @CRLF & _ "" & @CRLF & _ "die($placeholder_xml->saveHTML()); // to end execution of the remaining code in the calling file" & @CRLF & _ "/*" & @CRLF & _ "" & @CRLF & _ "*/" & @CRLF & _ "function eval2str($code)" & @CRLF & _ "{" & @CRLF & _ " ob_start();" & @CRLF & _ " eval("?>$code");" & @CRLF & _ " return ob_get_clean();" & @CRLF & _ "}" & @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