Regular Expressions 101

^start of line

Group 1(\+55)?

?repeats the group contents below at most once:

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

55the literal text 55

Character Class[\s]?

?matches at most one character from the set below:

\sa Unicode whitespace character

\(?optionally matches the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 2(\d{2})?

?repeats the group contents below at most once:

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

\)?optionally matches the literal ) (41₁₀ / 51₈ / 29₁₆)

Character Class[\s-]?

?matches at most one character from the set below:

\sa Unicode whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group 3(9?\d{4}[\s-]?\d{4})

9?optionally matches the literal 9 (57₁₀ / 71₈ / 39₁₆)

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

Character Class[\s-]?

?matches at most one character from the set below:

\sa Unicode whitespace character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

$end of line

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

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Search reference

Regular Expression

^(\+55)?[\s]?\(?(\d{2})?\)?[\s-]?(9?\d{4}[\s-]?\d{4})$

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