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

/
/
gm

Test String

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)(?<=class=\\"h3 u-block\\">)[\d\.]+`) var str = `<select data-testid=\"price-max-select\"><option value=\"\">Beliebig</option><option value=\"500\">500 €</option><option value=\"1000\">1.000 €</option><option value=\"1500\">1.500 €</option><option value=\"2000\">2.000 €</option><option value=\"2500\">2.500 €</option><option value=\"3000\">3.000 €</option><option value=\"3500\">3.500 €</option><option value=\"4000\">4.000 €</option><option value=\"4500\">4.500 €</option><option value=\"5000\">5.000 €</option><option value=\"6000\">6.000 €</option><option value=\"7000\">7.000 €</option><option value=\"8000\">8.000 €</option><option value=\"9000\">9.000 €</option><option value=\"10000\">10.000 €</option><option value=\"11000\">11.000 €</option><option value=\"12000\">12.000 €</option><option value=\"13000\">13.000 €</option><option value=\"14000\">14.000 €</option><option value=\"15000\">15.000 €</option><option value=\"17500\">17.500 €</option><option value=\"20000\">20.000 €</option><option value=\"22500\">22.500 €</option><option value=\"25000 +KLIMA+TEMPOMAT+EURO 5</span></div></div><div class=\"g-col-5\"><div class=\"price-block u-margin-bottom-9\"><span class=\"h3 u-block\">3.100&nbsp;€</span><span class=\"link financing-integration-lp-links\" data-budgetstatus=\"default\" data-prg-href=\"https://www.mobile.de/finanzierung/route/outlink/1?adId=361635483&amp;loanDuration=60 e+KLIMA+TEMPOMAT+EURO 5</span></div></div><div class=\"g-col-5\"><div class=\"price-block u-margin-bottom-9\"><span class=\"h3 u-block\">100&nbsp;€</span><span class=\"link financing-integration-lp-links\" data-budgetstatus=\"default\" data-prg-href=\"https://www.mobile.de/finanzierung/route/outlink/1?adId=361635483&amp;loanDuration=60" "e+KLIMA+TEMPOMAT+EURO 5</span></div></div><div class=\"g-col-5\"><div class=\"price-block u-margin-bottom-9\"><span class=\"h3 u-block\">3.100&nbsp;€</span><span class=\"link financing-integration-lp-links\" data-budgetstatus=\"default\" data-prg-href=\"https://www.mobile.de/finanzierung/route/outlink/1?adId=361635483&amp;loanDuration=60 e+KLIMA+TEMPOMAT+EURO 5</span></div></div><div class=\"g-col-5\"><div class=\"price-block u-margin-bottom-9\"><span class=\"h3 u-block\">20.100&nbsp;€</span><span class=\"link financing-integration-lp-links\" data-budgetstatus=\"default\" data-prg-href=\"https://www.mobile.de/finanzierung/route/outlink/1?adId=361635483&amp;loanDuration=60" ` for i, match := range re.FindAllString(str, -1) { fmt.Println(match, "found at index", i) } }

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/