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

/
/
mgxi

Test String

Code Generator

Language

Generated Code

import Foundation let pattern = ##""" ^ (?: (?:\+|00|011)[\.\/\-\ \t]* (?# group 1: country code after international dialing code) ([17]|2(?:[07]|[1-689]\d)|3(?:[0-4679]|[578]\d)|4(?:[013-9]|2\d)|5(?:[1-8]|[09]\d)|6(?:[0-6]|[789]\d)|8(?:[1246]|[035789]\d)|9(?:[0-58]|[679]\d)) [\.\/\-\ \t]* | (?# group 2: single-digit country code without international dialing code) ([17]) [\.\/\-\ \t]+(?# a separator is required for disambiguation) )? (?# group 3: area code between parentheses, optional) (?:\((\d{1,4})\)[\.\/\-\ \t]*)? (?# groups 4-7: leading groups of digits, may be empty) (?:(\d{1,6})[\.\/\-\ ])? (?:(\d{1,6})[\.\/\-\ ])? (?:(\d{1,6})[\.\/\-\ ])? (?:(\d{1,6})[\.\/\-\ ])? (?# group 8: start of the last group of digits, may be empty) (\d{0,10}?) (?# group 9: up to 4 digits at end of the last group of digits) (\d{1,4}+) (?: [\.\/\-;\ \t]*e?xt?[\.\/\-=\ \t]*+ (?# group 10: extension code, optional) (\d{1,14}) )? $ """## let regex = try! NSRegularExpression(pattern: pattern, options: [.anchorsMatchLines, .caseInsensitive, .allowCommentsAndWhitespace]) let testString = #""" All valid numbers should have a non-empty group 9 for the last digits (before extension): +1(234)567 8901 +1 234 567 8901 +1-234-567-8901 +1-234-567-8901 +1.234.567.8901 +1/234/567/8901 +7-123-456-7890 +7(123)4567890 +27-31-707-1700 +27-84-820-0365 +261-23-456-7890 +212 (34) 567-8901 +34123456789 +34 1 23 45 67 89 +34 123 456 789 +39 0577286143 +44(012)123456789 +49 (1234) 567890 +49 211 828934-0 +49 69 96876-150 1-234-555-8901 7-123-456-7890 0012315557890 001 230 123 456789 001-555012345 00210123456789 00271-12-345-6789 003312345678 009112345678 008001234567890 With an extension: +12345678901x1234 +1-234-567-8901 x1234 +7 123-4567890-x321 +7 123 4 5 6-7890x1234 +7-123-456-7890 ext 1234 +33(1)23.45.67.89 x 1234 +9123-456-7890x12345 +9123-456-7890;ext=12345 +91-92130-25552 01172312345678x901 011 7 231 234 5678 ext. 901 011 7 231 234 5678;ext=901 0091234567890x1234 0011234567890ext.1234 00223-(4321)-567.89 ext-4321 007-(123)-456-7890 ext 4321 007-(123)-456-7890;ext=4321 Local numbers only (or missing/unknown country code): (800)5678901 (800) 567 8901 (234) 567 8901 (234) 567 89 01 (1)23 45 67 89 (01)23 45 67 89 (0)1 23 45 67 89 (0)1 23 45 6789 (0)800 800 800 (0)800 800 800;ext=12 800-567-8901 234-567-8901 234 567 8901 01 23 45 67 89 01 23 45 6789 0 800 800 800 00-0-0000 123456789 123456789012 12345678901 2345678901 12345678 1234567890123 Local short numbers (up to 4 digits): 12 34 1234 112 911 15 Ambiguous or invalid format: 00-0--0000 (01 55) 1234 5678 (01 551) 234 5678 +012345678 +340123456789 ++34123456789 (0)123456789 12(34567890 123)456789012345 )234( 567 8901 ext1234 """# let stringRange = NSRange(location: 0, length: testString.utf16.count) let matches = regex.matches(in: testString, range: stringRange) var result: [[String]] = [] for match in matches { var groups: [String] = [] for rangeIndex in 1 ..< match.numberOfRanges { let nsRange = match.range(at: rangeIndex) guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue } let string = (testString as NSString).substring(with: nsRange) groups.append(string) } if !groups.isEmpty { result.append(groups) } } print(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 Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression