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
No Match

r'
'
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)COV2-([0-9]+)([\s]+)([A-Z]+)" Local $sString = " Name CDRH3" & @CRLF & _ "0 COV2-2997 ARGAIPPNSRAEIDY" & @CRLF & _ "1 COV2-3012 ARVLYDSSGFYNWFDP" & @CRLF & _ "2 COV2-2961 AAPYCSSISCNDGFDI" & @CRLF & _ "3 COV2-3025 AAPYCSSISCNDGFDI" & @CRLF & _ "4 COV2-2046 AKAHSTGHQYYYGMDV" & @CRLF & _ "5 COV2-2196 AAPYCSSISCNDGFDI" & @CRLF & _ "6 COV2-2901 ARSYDILTGYRDAFDI" & @CRLF & _ "7 COV2-2070 ARVGYSQGYYYYYMDV" & @CRLF & _ "8 COV2-2132 ARDFLRWHDL" & @CRLF & _ "9 COV2-2911 ARMSRGYNYAYTFDI" & @CRLF & _ "10 COV2-2098 VKGLFDWFPL" & @CRLF & _ "11 COV2-2108 AKGVDYGGKLAYFDS" & @CRLF & _ "12 COV2-2114 ARGRGYSNYGASYYMDV" & @CRLF & _ "13 COV2-2304 ARDPVWVDGELLSGGIPFDY" & @CRLF & _ "14 COV2-2078 ARVGVSGFKSGSNWYFDL" & @CRLF & _ "15 COV2-2299 ARDIDSGYDPTPVFDY" & @CRLF & _ "16 COV2-2351 ARRFYGPSSFDY" & @CRLF & _ "17 COV2-2318 ARGVVTYDY" & @CRLF & _ "18 COV2-2703 ARARGGYNWNFDY" & @CRLF & _ "19 COV2-2277 ARDVPTTVTAFTVFTY" & @CRLF & _ "20 COV2-2068 ARSYDILTGYRDAFDI" & @CRLF & _ "21 COV2-2504 ARVVVLGYGRPNNYYDGRNVWDY" & @CRLF & _ "22 COV2-2510 ARWGPDYGDYASNDY" & @CRLF & _ "23 COV2-2308 VKGLFDWFPL" & @CRLF & _ "24 COV2-2391 ARMRSGWPTHGRPDDF" & @CRLF & _ "25 COV2-2767 ARSYDILTGYRDAFDI" & @CRLF & _ "26 COV2-2113 ARDFLRWHDL" & @CRLF & _ "27 COV2-2290 ARMRSGWPTHGRPDDF" & @CRLF & _ "28 COV2-2130 TTAGSYYYDTVGPGLPEGKFDY" & @CRLF & _ "29 COV2-2050 ARVVVLGYGRPNNYYDGRNVWDY" & @CRLF & _ ".. ... ..." & @CRLF & _ "355 COV2-2587 AHRLWFRDAFDI" & @CRLF & _ "356 COV2-2551 ASGPPYMATFSYYFDY" & @CRLF & _ "357 COV2-2481 ARGWFGELLKGTYWFDP" & @CRLF & _ "358 COV2-2029 ARPTAGAGGAFDI" & @CRLF & _ "359 COV2-2590 ARGRVGYVGSGSRGYYYYYDMDV" & @CRLF & _ "360 COV2-2408 ARVGGISPYYYYYYMDV" & @CRLF & _ "361 COV2-2565 ARGAASFDY" & @CRLF & _ "362 COV2-2641 AKSYNGNYYDAFDI" & @CRLF & _ "363 COV2-2449 ARASYNSNWSIGEYFRD" & @CRLF & _ "364 COV2-2619 ARVEGDWLLGGPYYHYYGMDV" & @CRLF & _ "365 COV2-2367 ARTSHYDSSGSYFEY" & @CRLF & _ "366 COV2-2343 ARVQRRRLDY" & @CRLF & _ "367 COV2-2270 AITYYYDSSGYWWDD" & @CRLF & _ "368 COV2-2187 ARGGATNFDY" & @CRLF & _ "369 COV2-2478 AKGIYYDIFMPLLD" & @CRLF & _ "370 COV2-2820 ARDQSQGAYILTGYRGYGMDV" & @CRLF & _ "371 COV2-2620 ARADTMVRGTYFEY" & @CRLF & _ "372 COV2-2171 ARLSGSSWDFDY" & @CRLF & _ "373 COV2-2583 ARGGIYYLVRGFIIGYYGMDV" & @CRLF & _ "374 COV2-2227 ARDQSQGAYILTGYRGYGMDV" & @CRLF & _ "375 COV2-2160 ARSTSGSYYYGMDV" & @CRLF & _ "376 COV2-2178 ARVGSSSWYFDY" & @CRLF & _ "377 COV2-2159 ARSTSGSYYYGMDV" & @CRLF & _ "378 COV2-2166 ARIGHFDSSGYYLDY" & @CRLF & _ "379 COV2-2224 AKDGSIAAADY" & @CRLF & _ "380 COV2-2214 ARIGHFDSSGYYLDY" & @CRLF & _ "381 COV2-2218 ARPYTGSYKSYMDV" & @CRLF & _ "382 COV2-2216 ARTSHYDSSGSYFEY" & @CRLF & _ "383 COV2-2175 ARLSGSSWDFDY" & @CRLF & _ "384 COV2-2183 ARADTMVRGTYFEY" & @CRLF & _ "" & @CRLF & _ "[385 rows x 2 columns]" & @CRLF & _ " Name CDRH3" & @CRLF & _ "0 COV2-2997 ARGAIPPNSRAEIDY" & @CRLF & _ "1 COV2-3012 ARVLYDSSGFYNWFDP" & @CRLF & _ "2 COV2-2961 AAPYCSSISCNDGFDI" & @CRLF & _ "3 COV2-3025 AAPYCSSISCNDGFDI" & @CRLF & _ "4 COV2-2046 AKAHSTGHQYYYGMDV" & @CRLF & _ "5 COV2-2196 AAPYCSSISCNDGFDI" & @CRLF & _ "6 COV2-2901 ARSYDILTGYRDAFDI" & @CRLF & _ "7 COV2-2070 ARVGYSQGYYYYYMDV" & @CRLF & _ "8 COV2-2132 ARDFLRWHDL" & @CRLF & _ "9 COV2-2911 ARMSRGYNYAYTFDI" & @CRLF & _ "10 COV2-2098 VKGLFDWFPL" & @CRLF & _ "11 COV2-2108 AKGVDYGGKLAYFDS" & @CRLF & _ "12 COV2-2114 ARGRGYSNYGASYYMDV" & @CRLF & _ "13 COV2-2304 ARDPVWVDGELLSGGIPFDY" & @CRLF & _ "14 COV2-2078 ARVGVSGFKSGSNWYFDL" & @CRLF & _ "15 COV2-2299 ARDIDSGYDPTPVFDY" & @CRLF & _ "16 COV2-2351 ARRFYGPSSFDY" & @CRLF & _ "17 COV2-2318 ARGVVTYDY" & @CRLF & _ "18 COV2-2703 ARARGGYNWNFDY" & @CRLF & _ "19 COV2-2277 ARDVPTTVTAFTVFTY" & @CRLF & _ "20 COV2-2068 ARSYDILTGYRDAFDI" & @CRLF & _ "21 COV2-2504 ARVVVLGYGRPNNYYDGRNVWDY" & @CRLF & _ "22 COV2-2510 ARWGPDYGDYASNDY" & @CRLF & _ "23 COV2-2308 VKGLFDWFPL" & @CRLF & _ "24 COV2-2391 ARMRSGWPTHGRPDDF" & @CRLF & _ "25 COV2-2767 ARSYDILTGYRDAFDI" & @CRLF & _ "26 COV2-2113 ARDFLRWHDL" & @CRLF & _ "27 COV2-2290 ARMRSGWPTHGRPDDF" & @CRLF & _ "28 COV2-2130 TTAGSYYYDTVGPGLPEGKFDY" & @CRLF & _ "29 COV2-2050 ARVVVLGYGRPNNYYDGRNVWDY" & @CRLF & _ ".. ... ..." & @CRLF & _ "355 COV2-2587 AHRLWFRDAFDI" & @CRLF & _ "356 COV2-2551 ASGPPYMATFSYYFDY" & @CRLF & _ "357 COV2-2481 ARGWFGELLKGTYWFDP" & @CRLF & _ "358 COV2-2029 ARPTAGAGGAFDI" & @CRLF & _ "359 COV2-2590 ARGRVGYVGSGSRGYYYYYDMDV" & @CRLF & _ "360 COV2-2408 ARVGGISPYYYYYYMDV" & @CRLF & _ "361 COV2-2565 ARGAASFDY" & @CRLF & _ "362 COV2-2641 AKSYNGNYYDAFDI" & @CRLF & _ "363 COV2-2449 ARASYNSNWSIGEYFRD" & @CRLF & _ "364 COV2-2619 ARVEGDWLLGGPYYHYYGMDV" & @CRLF & _ "365 COV2-2367 ARTSHYDSSGSYFEY" & @CRLF & _ "366 COV2-2343 ARVQRRRLDY" & @CRLF & _ "367 COV2-2270 AITYYYDSSGYWWDD" & @CRLF & _ "368 COV2-2187 ARGGATNFDY" & @CRLF & _ "369 COV2-2478 AKGIYYDIFMPLLD" & @CRLF & _ "370 COV2-2820 ARDQSQGAYILTGYRGYGMDV" & @CRLF & _ "371 COV2-2620 ARADTMVRGTYFEY" & @CRLF & _ "372 COV2-2171 ARLSGSSWDFDY" & @CRLF & _ "373 COV2-2583 ARGGIYYLVRGFIIGYYGMDV" & @CRLF & _ "374 COV2-2227 ARDQSQGAYILTGYRGYGMDV" & @CRLF & _ "375 COV2-2160 ARSTSGSYYYGMDV" & @CRLF & _ "376 COV2-2178 ARVGSSSWYFDY" & @CRLF & _ "377 COV2-2159 ARSTSGSYYYGMDV" & @CRLF & _ "378 COV2-2166 ARIGHFDSSGYYLDY" & @CRLF & _ "379 COV2-2224 AKDGSIAAADY" & @CRLF & _ "380 COV2-2214 ARIGHFDSSGYYLDY" & @CRLF & _ "381 COV2-2218 ARPYTGSYKSYMDV" & @CRLF & _ "382 COV2-2216 ARTSHYDSSGSYFEY" & @CRLF & _ "383 COV2-2175 ARLSGSSWDFDY" & @CRLF & _ "384 COV2-2183 ARADTMVRGTYFEY" & @CRLF & _ "" & @CRLF & _ "[385 rows x 2 columns]" & @CRLF & _ " Name CDRH3" & @CRLF & _ "0 COV2-2997 ARGAIPPNSRAEIDY" & @CRLF & _ "1 COV2-3012 ARVLYDSSGFYNWFDP" & @CRLF & _ "2 COV2-2961 AAPYCSSISCNDGFDI" & @CRLF & _ "3 COV2-3025 AAPYCSSISCNDGFDI" & @CRLF & _ "4 COV2-2046 AKAHSTGHQYYYGMDV" & @CRLF & _ "5 COV2-2196 AAPYCSSISCNDGFDI" & @CRLF & _ "6 COV2-2901 ARSYDILTGYRDAFDI" & @CRLF & _ "7 COV2-2070 ARVGYSQGYYYYYMDV" & @CRLF & _ "8 COV2-2132 ARDFLRWHDL" & @CRLF & _ "9 COV2-2911 ARMSRGYNYAYTFDI" & @CRLF & _ "10 COV2-2098 VKGLFDWFPL" & @CRLF & _ "11 COV2-2108 AKGVDYGGKLAYFDS" & @CRLF & _ "12 COV2-2114 ARGRGYSNYGASYYMDV" & @CRLF & _ "13 COV2-2304 ARDPVWVDGELLSGGIPFDY" & @CRLF & _ "14 COV2-2078 ARVGVSGFKSGSNWYFDL" & @CRLF & _ "15 COV2-2299 ARDIDSGYDPTPVFDY" & @CRLF & _ "16 COV2-2351 ARRFYGPSSFDY" & @CRLF & _ "17 COV2-2318 ARGVVTYDY" & @CRLF & _ "18 COV2-2703 ARARGGYNWNFDY" & @CRLF & _ "19 COV2-2277 ARDVPTTVTAFTVFTY" & @CRLF & _ "20 COV2-2068 ARSYDILTGYRDAFDI" & @CRLF & _ "21 COV2-2504 ARVVVLGYGRPNNYYDGRNVWDY" & @CRLF & _ "22 COV2-2510 ARWGPDYGDYASNDY" & @CRLF & _ "23 COV2-2308 VKGLFDWFPL" & @CRLF & _ "24 COV2-2391 ARMRSGWPTHGRPDDF" & @CRLF & _ "25 COV2-2767 ARSYDILTGYRDAFDI" & @CRLF & _ "26 COV2-2113 ARDFLRWHDL" & @CRLF & _ "27 COV2-2290 ARMRSGWPTHGRPDDF" & @CRLF & _ "28 COV2-2130 TTAGSYYYDTVGPGLPEGKFDY" & @CRLF & _ "29 COV2-2050 ARVVVLGYGRPNNYYDGRNVWDY" & @CRLF & _ ".. ... ..." & @CRLF & _ "355 COV2-2587 AHRLWFRDAFDI" & @CRLF & _ "356 COV2-2551 ASGPPYMATFSYYFDY" & @CRLF & _ "357 COV2-2481 ARGWFGELLKGTYWFDP" & @CRLF & _ "358 COV2-2029 ARPTAGAGGAFDI" & @CRLF & _ "359 COV2-2590 ARGRVGYVGSGSRGYYYYYDMDV" & @CRLF & _ "360 COV2-2408 ARVGGISPYYYYYYMDV" & @CRLF & _ "361 COV2-2565 ARGAASFDY" & @CRLF & _ "362 COV2-2641 AKSYNGNYYDAFDI" & @CRLF & _ "363 COV2-2449 ARASYNSNWSIGEYFRD" & @CRLF & _ "364 COV2-2619 ARVEGDWLLGGPYYHYYGMDV" & @CRLF & _ "365 COV2-2367 ARTSHYDSSGSYFEY" & @CRLF & _ "366 COV2-2343 ARVQRRRLDY" & @CRLF & _ "367 COV2-2270 AITYYYDSSGYWWDD" & @CRLF & _ "368 COV2-2187 ARGGATNFDY" & @CRLF & _ "369 COV2-2478 AKGIYYDIFMPLLD" & @CRLF & _ "370 COV2-2820 ARDQSQGAYILTGYRGYGMDV" & @CRLF & _ "371 COV2-2620 ARADTMVRGTYFEY" & @CRLF & _ "372 COV2-2171 ARLSGSSWDFDY" & @CRLF & _ "373 COV2-2583 ARGGIYYLVRGFIIGYYGMDV" & @CRLF & _ "374 COV2-2227 ARDQSQGAYILTGYRGYGMDV" & @CRLF & _ "375 COV2-2160 ARSTSGSYYYGMDV" & @CRLF & _ "376 COV2-2178 ARVGSSSWYFDY" & @CRLF & _ "377 COV2-2159 ARSTSGSYYYGMDV" & @CRLF & _ "378 COV2-2166 ARIGHFDSSGYYLDY" & @CRLF & _ "379 COV2-2224 AKDGSIAAADY" & @CRLF & _ "380 COV2-2214 ARIGHFDSSGYYLDY" & @CRLF & _ "381 COV2-2218 ARPYTGSYKSYMDV" & @CRLF & _ "382 COV2-2216 ARTSHYDSSGSYFEY" & @CRLF & _ "383 COV2-2175 ARLSGSSWDFDY" & @CRLF & _ "384 COV2-2183 ARADTMVRGTYFEY" & @CRLF & _ "" & @CRLF & _ "[385 rows x 2 columns]" & @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