Regular Expressions 101

Non-Capturing Group(?:\+?(?<!\d)\d[\s-]?)?

?repeats the group contents below at most once:

\+?optionally matches the literal + (43₁₀ / 53₈ / 2B₁₆)

Negative Lookbehind(?<!\d)

\da digit

Character Class[\s-]?

?matches at most one character from the set below:

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[([\s-]{0,2}

{0,2}matches between 0 and 2 characters from the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Negative Lookbehind(?<!\d)

\da digit

\d{2,3}a digit, repeated between 2 and 3 times

Character Class[)\]\s-]{0,2}

{0,2}matches between 0 and 2 characters from the set below:

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:\d{3}[\s-]?\d{4}|\d{2}[\s-]?\d{2}[\s-]?\d{3})

1st Alternative\d{3}[\s-]?\d{4}

\d{3}a digit, repeated exactly 3 times

Character Class[\s-]?

?matches at most one character from the set below:

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{4}a digit, repeated exactly 4 times

2nd Alternative\d{2}[\s-]?\d{2}[\s-]?\d{3}

\d{2}a digit, repeated exactly 2 times

Character Class[\s-]?

?matches at most one character from the set below:

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{2}a digit, repeated exactly 2 times

Character Class[\s-]?

?matches at most one character from the set below:

\sany whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{3}a digit, repeated exactly 3 times

Negative Lookahead(?!\d)

\da digit

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?:\+?(?<!\d)\d[\s-]?)?[([\s-]{0,2}(?<!\d)\d{2,3}[)\]\s-]{0,2}(?:\d{3}[\s-]?\d{4}|\d{2}[\s-]?\d{2}[\s-]?\d{3})(?!\d)

New

088 11 22 458
+1 88 11 22 458

Regular Expression

Substitution