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

/
/
ims

Test String

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?ims)((<.*?):Envelope.*Envelope>)`) var str = `31-10-2014 00:12:12,075 [INFO] REQUEST: <?xml version="1.0" encoding="utf-8"?><SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:ns2="urn:ZEKTransactionService" xmlns:ns1="http://zeksoap.xml.prechku.sys:7001/dvzek/services/ZEKTransactionService" xmlns:ns3="http://impl.zkb.appl.ch"><SOAP-ENV:Body SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><ns1:closeLeasingMietvertrag><identityDescriptor xsi:type="ns2:IdentityDescriptor"><clientUserId xsi:type="xsd:string">EXPLOIT</clientUserId><name xsi:type="xsd:string">RCISoapUser</name><password xsi:type="xsd:string">ziucx+okpb</password></identityDescriptor><requestEntities xsi:type="SOAP-ENC:Array" SOAP-ENC:arrayType="ns2:RequestEntity[1]"><item xsi:type="ns2:RequestEntity"><addressDescription xsi:type="ns2:AddressDescription"><birthdate xsi:type="xsd:string">1961-03-13</birthdate><city xsi:type="xsd:string">Balsthal</city><country xsi:type="xsd:string">CHE</country><datumWohnhaftSeit xsi:type="xsd:string">1990-04-01</datumWohnhaftSeit><firstname xsi:type="xsd:string">Mina</firstname><housenumber xsi:type="xsd:string">.</housenumber><legalForm xsi:type="xsd:int">1</legalForm><name xsi:type="xsd:string">Bilalli</name><nationality xsi:type="xsd:string">XKO</nationality><sex xsi:type="xsd:int">1</sex><street xsi:type="xsd:string">Guntenfluhweg 14</street><zip xsi:type="xsd:string">4710</zip><zivilstandscode xsi:type="xsd:int">1</zivilstandscode></addressDescription><debtorRole xsi:type="xsd:int">0</debtorRole><forceNewAddress xsi:type="xsd:int">0</forceNewAddress><previousReturnCode xsi:type="xsd:int">0</previousReturnCode><refno xsi:type="xsd:int">1</refno></item></requestEntities><leasingMietvertrag xsi:type="ns2:LeasingMietvertragDescription"><anzahlMonatlicheRaten xsi:type="xsd:int">0</anzahlMonatlicheRaten><anzahlung xsi:type="xsd:int">0</anzahlung><bonitaetsCodeIKO xsi:type="xsd:int">4</bonitaetsCodeIKO><bonitaetsCodeZEK xsi:type="xsd:int">5</bonitaetsCodeZEK><datumBonitaetIKO xsi:type="xsd:string">2014-10-30</datumBonitaetIKO><datumBonitaetZEK xsi:type="xsd:string">2014-10-30</datumBonitaetZEK><debtorRole xsi:type="xsd:int">0</debtorRole><ersteGrosseRate xsi:type="xsd:int">0</ersteGrosseRate><filiale xsi:type="xsd:int">0</filiale><grosseSchlussrate xsi:type="xsd:int">0</grosseSchlussrate><herkunft xsi:type="xsd:int">0</herkunft><kennzeichen xsi:type="xsd:int">0</kennzeichen><kreditBetrag xsi:type="xsd:float">0</kreditBetrag><kreditVertragID xsi:type="xsd:string">142051011553</kreditVertragID><monatsrate xsi:type="xsd:float">0</monatsrate><restwert xsi:type="xsd:int">0</restwert><sicherstellungsCode xsi:type="xsd:int">0</sicherstellungsCode><theoRestSaldo xsi:type="xsd:float">0</theoRestSaldo><vertragsStatus xsi:type="xsd:int">0</vertragsStatus></leasingMietvertrag></ns1:closeLeasingMietvertrag></SOAP-ENV:Body></SOAP-ENV:Envelope> | Thread:http-7001-Processor23` if len(re.FindStringIndex(str)) > 0 { fmt.Println(re.FindString(str),"found at index",re.FindStringIndex(str)[0]) } }

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 Golang, please visit: https://golang.org/pkg/regexp/