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

Substitution

Processing...

Code Generator

Language

Generated Code

re = /^.*?(\+?(?:\d{11,14})|(?:\d{5}\s(?:\d{3}\s\d{3}|\d{6}))|(?:\d{3}(?:\s\d{3}){3})|(?:\d{4}\s\d{3}\s\d{3})).*$/m str = 'This is sample. 775 657 7576 sample Second sample line. 661-525-5366 sample 123 Third line sample 466.755.7888. 07123452670 07812 345 931 07412 123466 00447912345188 +971557017442 +971 557 856 832 0414 934 993 So basically, I need a regex for matching 11 digits. (07123456270) Matching 5 digits, followed by space, followed by 3 digits, followed by space, followed by 3 digits. (07812 345 931) Matching 5 digits, followed by space, followed by 6 digits (07412 123466) Matching 14 digits (12345678901234) Matching a + sign followed after with 12 digits (+971557017442) Matching + followed with 3 digits, space, followed by 3 digits, space, 3 more digits (+971 557 856 832) Last one, 4 digits, space, 3 digits, space, 3 digits. (0414 934 993) Someone please help' subst = '$1' result = str.gsub(re, subst) # Print the result of the substitution puts 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 Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html