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

r"
"
gm

Test String

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)(?:(?<=^)|(?<=\D))((00|\+)?55(\s|\.|-)*)?((\()?0?\d{2}(?(5)\)|)(\s|\.|-)*)?(9(\s|\.|-)*)?\d{4}(\s|\.|-)*\d{4}(?=\D|$)`) var str = `98993132 9899-3132 9899.3132 9899 3132 7198993132 719899-3132 719899.3132 719899 3132 71 98993132 71 9899-3132 71 9899.3132 71 9899 3132 071 98993132 071 9899-3132 071 9899.3132 071 9899 3132 (71)98993132 (71)9899-3132 (71)9899.3132 (71)9899 3132 (71) 98993132 (71) 9899-3132 (71) 9899.3132 (071) 9899 3132 (071) 98993132 (071) 9899-3132 (071) 9899.3132 (071) 9899 3132 557198993132 55719899-3132 55719899.3132 55719899 3132 5571 98993132 5571 9899-3132 5571 9899.3132 5571 9899 3132 55071 98993132 55071 9899-3132 55071 9899.3132 55071 9899 3132 55(71)98993132 55(71)9899-3132 55(71)9899.3132 55(71)9899 3132 55(71) 98993132 55(71) 9899-3132 55(71) 9899.3132 55(071) 9899 3132 55(071) 98993132 55(071) 9899-3132 55(071) 9899.3132 55(071) 9899 3132 55 7198993132 55 719899-3132 55 719899.3132 55 719899 3132 55 71 98993132 55 71 9899-3132 55 71 9899.3132 55 71 9899 3132 55 071 98993132 55 071 9899-3132 55 071 9899.3132 55 071 9899 3132 55 (71)98993132 55 (71)9899-3132 55 (71)9899.3132 55 (71)9899 3132 55 (71) 98993132 55 (71) 9899-3132 55 (71) 9899.3132 55 (071) 9899 3132 55 (071) 98993132 55 (071) 9899-3132 55 (071) 9899.3132 55 (071) 9899 3132 +557198993132 +55719899-3132 +55719899.3132 +55719899 3132 +5571 98993132 +5571 9899-3132 +5571 9899.3132 +5571 9899 3132 +55071 98993132 +55071 9899-3132 +55071 9899.3132 +55071 9899 3132 +55(71)98993132 +55(71)9899-3132 +55(71)9899.3132 +55(71)9899 3132 +55(71) 98993132 +55(71) 9899-3132 +55(71) 9899.3132 +55(071) 9899 3132 +55(071) 98993132 +55(071) 9899-3132 +55(071) 9899.3132 +55(071) 9899 3132 +55 7198993132 +55 719899-3132 +55 719899.3132 +55 719899 3132 +55 71 98993132 +55 71 9899-3132 +55 71 9899.3132 +55 71 9899 3132 +55 071 98993132 +55 071 9899-3132 +55 071 9899.3132 +55 071 9899 3132 +55 (71)98993132 +55 (71)9899-3132 +55 (71)9899.3132 +55 (71)9899 3132 +55 (71) 98993132 +55 (71) 9899-3132 +55 (71) 9899.3132 +55 (071) 9899 3132 +55 (071) 98993132 +55 (071) 9899-3132 +55 (071) 9899.3132 +55 (071) 9899 3132 998993132 99899-3132 99899.3132 99899 3132 71998993132 7199899-3132 7199899.3132 7199899 3132 71 998993132 71 99899-3132 71 99899.3132 71 99899 3132 071 998993132 071 99899-3132 071 99899.3132 071 99899 3132 (71)998993132 (71)99899-3132 (71)99899.3132 (71)99899 3132 (71) 998993132 (71) 99899-3132 (71) 99899.3132 (071) 99899 3132 (071) 998993132 (071) 99899-3132 (071) 99899.3132 (071) 99899 3132 5571998993132 557199899-3132 557199899.3132 557199899 3132 5571 998993132 5571 99899-3132 5571 99899.3132 5571 99899 3132 55071 998993132 55071 99899-3132 55071 99899.3132 55071 99899 3132 55(71)998993132 55(71)99899-3132 55(71)99899.3132 55(71)99899 3132 55(71) 998993132 55(71) 99899-3132 55(71) 99899.3132 55(071) 99899 3132 55(071) 998993132 55(071) 99899-3132 55(071) 99899.3132 55(071) 99899 3132 55 71998993132 55 7199899-3132 55 7199899.3132 55 7199899 3132 55 71 998993132 55 71 99899-3132 55 71 99899.3132 55 71 99899 3132 55 071 998993132 55 071 99899-3132 55 071 99899.3132 55 071 99899 3132 55 (71)998993132 55 (71)99899-3132 55 (71)99899.3132 55 (71)99899 3132 55 (71) 998993132 55 (71) 99899-3132 55 (71) 99899.3132 55 (071) 99899 3132 55 (071) 998993132 55 (071) 99899-3132 55 (071) 99899.3132 55 (071) 99899 3132 +5571998993132 +557199899-3132 +557199899.3132 +557199899 3132 +5571 998993132 +5571 99899-3132 +5571 99899.3132 +5571 99899 3132 +55071 998993132 +55071 99899-3132 +55071 99899.3132 +55071 99899 3132 +55(71)998993132 +55(71)99899-3132 +55(71)99899.3132 +55(71)99899 3132 +55(71) 998993132 +55(71) 99899-3132 +55(71) 99899.3132 +55(071) 99899 3132 +55(071) 998993132 +55(071) 99899-3132 +55(071) 99899.3132 +55(071) 99899 3132 +55 71998993132 +55 7199899-3132 +55 7199899.3132 +55 7199899 3132 +55 71 998993132 +55 71 99899-3132 +55 71 99899.3132 +55 71 99899 3132 +55 071 998993132 +55 071 99899-3132 +55 071 99899.3132 +55 071 99899 3132 +55 (71)998993132 +55 (71)99899-3132 +55 (71)99899.3132 +55 (71)99899 3132 +55 (71) 998993132 +55 (71) 99899-3132 +55 (71) 99899.3132 +55 (071) 99899 3132 +55 (071) 998993132 +55 (071) 99899-3132 +55 (071) 99899.3132 +55 (071) 99899 3132 9 98993132 9 9899-3132 9 9899.3132 9 9899 3132 719 98993132 719 9899-3132 719 9899.3132 719 9899 3132 71 9 98993132 71 9 9899-3132 71 9 9899.3132 71 9 9899 3132 071 9 98993132 071 9 9899-3132 071 9 9899.3132 071 9 9899 3132 (71)9 98993132 (71)9 9899-3132 (71)9 9899.3132 (71)9 9899 3132 (71) 9 98993132 (71) 9 9899-3132 (71) 9 9899.3132 (071) 9 9899 3132 (071) 9 98993132 (071) 9 9899-3132 (071) 9 9899.3132 (071) 9 9899 3132 55719 98993132 55719 9899-3132 55719 9899.3132 55719 9899 3132 5571 9 98993132 5571 9 9899-3132 5571 9 9899.3132 5571 9 9899 3132 55071 9 98993132 55071 9 9899-3132 55071 9 9899.3132 55071 9 9899 3132 55(71)9 98993132 55(71)9 9899-3132 55(71)9 9899.3132 55(71)9 9899 3132 55(71) 9 98993132 55(71) 9 9899-3132 55(71) 9 9899.3132 55(071) 9 9899 3132 55(071) 9 98993132 55(071) 9 9899-3132 55(071) 9 9899.3132 55(071) 9 9899 3132 55 719 98993132 55 719 9899-3132 55 719 9899.3132 55 719 9899 3132 55 71 9 98993132 55 71 9 9899-3132 55 71 9 9899.3132 55 71 9 9899 3132 55 071 9 98993132 55 071 9 9899-3132 55 071 9 9899.3132 55 071 9 9899 3132 55 (71)9 98993132 55 (71)9 9899-3132 55 (71)9 9899.3132 55 (71)9 9899 3132 55 (71) 9 98993132 55 (71) 9 9899-3132 55 (71) 9 9899.3132 55 (071) 9 9899 3132 55 (071) 9 98993132 55 (071) 9 9899-3132 55 (071) 9 9899.3132 55 (071) 9 9899 3132 +55719 98993132 +55719 9899-3132 +55719 9899.3132 +55719 9899 3132 +5571 9 98993132 +5571 9 9899-3132 +5571 9 9899.3132 +5571 9 9899 3132 +55071 9 98993132 +55071 9 9899-3132 +55071 9 9899.3132 +55071 9 9899 3132 +55(71)9 98993132 +55(71)9 9899-3132 +55(71)9 9899.3132 +55(71)9 9899 3132 +55(71) 9 98993132 +55(71) 9 9899-3132 +55(71) 9 9899.3132 +55(071) 9 9899 3132 +55(071) 9 98993132 +55(071) 9 9899-3132 +55(071) 9 9899.3132 +55(071) 9 9899 3132 +55 719 98993132 +55 719 9899-3132 +55 719 9899.3132 +55 719 9899 3132 +55 71 9 98993132 +55 71 9 9899-3132 +55 71 9 9899.3132 +55 71 9 9899 3132 +55 071 9 98993132 +55 071 9 9899-3132 +55 071 9 9899.3132 +55 071 9 9899 3132 +55 (71)9 98993132 +55 (71)9 9899-3132 +55 (71)9 9899.3132 +55 (71)9 9899 3132 +55 (71) 9 98993132 +55 (71) 9 9899-3132 +55 (71) 9 9899.3132 +55 (071) 9 9899 3132 +55 (071) 9 98993132 +55 (071) 9 9899-3132 +55 (071) 9 9899.3132 +55 (071) 9 9899 3132 ====== partial matches ======= 55(71 9 7676-3131 55 (71 7676-3131 porque76763131sera ======== no matches ========== 41650-010 123.456.789-00 123456789-00` 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/