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)EMAIL:\s*([a-zA-Z0-9_.±]+@[a-zA-Z0-9-]+.[a-zA-Z0-9-.]+)\s*Τηλέφωνο:\s*(?<phone>\+?[\d\s-]+?)\s*Είστε πιστοποιημένος θεραπευτής;(?<therapist>[^\n]+)\s*Συμμετέχετε σε θεραπευτική εκπαίδευση;:(?<psychotherapy>[^\n]+)\s*`) var str = `Contact form - therapistForm Below are the values the user has filled in the form. Beware they are not verified in any way and anyone could have sent the form as it is public. EMAIL: katerina@hedepy.gr Τηλέφωνο: 123456789 Είστε πιστοποιημένος θεραπευτής;: ναι Συμμετέχετε σε θεραπευτική εκπαίδευση;: ναι Your team Hedepy Tel.:+30 694 244 8711 Hedepy s.r.o., IČO: 09206281 V Tišině 474/3, Dejvice, 160 00 Praha 6` 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/