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

/
/
gx

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 = "(?x)(?m)^\s*\d+\..*\R{2} # Get to the title" & @CRLF & _ "(?<title>[^\n]*(?:\n(?!\n)[^\n]*)*) # Get title" & @CRLF & _ "\R{2} # Get to the authors" & @CRLF & _ "[^\n]*(?:\n(?!\R)[^\R]*)* # Consume authors" & @CRLF & _ "(?<abstract>[^\[]*(?:\[(?!PubMed[ ]-[ ]indexed[ ]for[ ]MEDLINE\])[^\[]*)*) # Grab abstract" Local $sString = "1. Br J Biomed Sci. 2015;72(3):93-101." & @CRLF & _ "" & @CRLF & _ "Effects of propofol and isoflurane on haemodynamics and the inflammatory response" & @CRLF & _ "in cardiopulmonary bypass surgery." & @CRLF & _ "" & @CRLF & _ "Sayed S, Idriss NK, Sayyedf HG, Ashry AA, Rafatt DM, Mohamed AO, Blann AD." & @CRLF & _ "" & @CRLF & _ "Cardiopulmonary bypass (CPB) causes reperfusion injury that when most severe is" & @CRLF & _ "clinically manifested as a systemic inflammatory response syndrome. The" & @CRLF & _ "anaesthetic propofol may have anti-inflammatory properties that may reduce such a" & @CRLF & _ "response. We hypothesised differing effects of propofol and isoflurane on" & @CRLF & _ "inflammatory markers in patients having CBR Forty patients undergoing elective" & @CRLF & _ "CPB were randomised to receive either propofol or isoflurane for maintenance of" & @CRLF & _ "anaesthesia. CRP, IL-6, IL-8, HIF-1α (ELISA), CD11 and CD18 expression (flow" & @CRLF & _ "cytometry), and haemoxygenase (HO-1) promoter polymorphisms (PCR/electrophoresis)" & @CRLF & _ "were measured before anaesthetic induction, 4 hours post-CPB, and 24 hours later." & @CRLF & _ "There were no differences in the 4 hours changes in CRP, IL-6, IL-8 or CD18" & @CRLF & _ "between the two groups, but those in the propofol group had higher HIF-1α (P =" & @CRLF & _ "0.016) and lower CD11 expression (P = 0.026). After 24 hours, compared to the" & @CRLF & _ "isoflurane group, the propofol group had significantly lower levels of CRP (P <" & @CRLF & _ "0.001), IL-6 (P < 0.001) and IL-8 (P < 0.001), with higher levels CD11 (P =" & @CRLF & _ "0.009) and CD18 (P = 0.002) expression. After 24 hours, patients on propofol had " & @CRLF & _ "increased expression of shorter HO-1 GT(n) repeats than patients on isoflurane (P" & @CRLF & _ "= 0.001). Use of propofol in CPB is associated with a less adverse inflammatory" & @CRLF & _ "profile than is isofluorane, and an increased up-regulation of HO-1. This" & @CRLF & _ "supports the hypothesis that propofol has anti-inflammatory activity." & @CRLF & _ "" & @CRLF & _ "PMID: 26510263 [PubMed - indexed for MEDLINE]" & @CRLF & _ "11. Br J Biomed Sci. 2015;72(3):93-101." & @CRLF & _ "" & @CRLF & _ "Effects of propofol and isoflurane on haemodynamics and the inflammatory response" & @CRLF & _ "in cardiopulmonary bypass surgery." & @CRLF & _ "" & @CRLF & _ "Sayed S, Idriss NK, Sayyedf HG, Ashry AA, Rafatt DM, Mohamed AO, Blann AD." & @CRLF & _ "" & @CRLF & _ "Cardiopulmonary bypass (CPB) causes reperfusion injury that when most severe is" & @CRLF & _ "clinically manifested as a systemic inflammatory response syndrome. The" & @CRLF & _ "anaesthetic propofol may have anti-inflammatory properties that may reduce such a" & @CRLF & _ "response. We hypothesised differing effects of propofol and isoflurane on" & @CRLF & _ "inflammatory markers in patients having CBR Forty patients undergoing elective" & @CRLF & _ "CPB were randomised to receive either propofol or isoflurane for maintenance of" & @CRLF & _ "anaesthesia. CRP, IL-6, IL-8, HIF-1α (ELISA), CD11 and CD18 expression (flow" & @CRLF & _ "cytometry), and haemoxygenase (HO-1) promoter polymorphisms (PCR/electrophoresis)" & @CRLF & _ "were measured before anaesthetic induction, 4 hours post-CPB, and 24 hours later." & @CRLF & _ "There were no differences in the 4 hours changes in CRP, IL-6, IL-8 or CD18" & @CRLF & _ "between the two groups, but those in the propofol group had higher HIF-1α (P =" & @CRLF & _ "0.016) and lower CD11 expression (P = 0.026). After 24 hours, compared to the" & @CRLF & _ "isoflurane group, the propofol group had significantly lower levels of CRP (P <" & @CRLF & _ "0.001), IL-6 (P < 0.001) and IL-8 (P < 0.001), with higher levels CD11 (P =" & @CRLF & _ "0.009) and CD18 (P = 0.002) expression. After 24 hours, patients on propofol had " & @CRLF & _ "increased expression of shorter HO-1 GT(n) repeats than patients on isoflurane (P" & @CRLF & _ "= 0.001). Use of propofol in CPB is associated with a less adverse inflammatory" & @CRLF & _ "profile than is isofluorane, and an increased up-regulation of HO-1. This" & @CRLF & _ "supports the hypothesis that propofol has anti-inflammatory activity." & @CRLF & _ "" & @CRLF & _ "PMID: 26510263 [PubMed - indexed for MEDLINE]" 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