regex101: PCRE (Legacy) Match Workspace

Character Class[(\d]

(the literal ( (40₁₀ / 50₈ / 28₁₆)

\da digit

Non-Capturing Group(?: \b \d{3} \) (?= .{3,5} \W \b ) \g<spb> \d{3} | \B \d{2} (?= .{4,6} \W \b ) \g<sp> \d{3} )

1st Alternative \b \d{3} \) (?= .{3,5} \W \b ) \g<spb> \d{3}

\ban ASCII word boundary

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

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Positive Lookahead(?= .{3,5} \W \b )

.{3,5}any character (except for line terminators), repeated between 3 and 5 times

\Wany non-word character

\ban ASCII word boundary

\g<spb>calls group spb as a subroutine

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

2nd Alternative \B \d{2} (?= .{4,6} \W \b ) \g<sp> \d{3}

\Bnot an ASCII word boundary

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

Positive Lookahead(?= .{4,6} \W \b )

.{4,6}any character (except for line terminators), repeated between 4 and 6 times

\Wany non-word character

\ban ASCII word boundary

\g<sp>calls group sp as a subroutine

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

\g<sp>calls group sp as a subroutine

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

\ban ASCII word boundary

Group spb(?<spb> [ ]{0,2} ){0}

{0}repeats the group contents below exactly 0 times:

Character Class[ ]{0,2}

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

the literal (32₁₀ / 40₈ / 20₁₆)

Comment: separator after bracket

Group sp(?<sp> - [ ]? | [ ] -? [ ]? ){0}

{0}repeats the group contents below exactly 0 times:

1st Alternative - [ ]?

- the literal text -

Character Class[ ]?

?matches at most one character from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

2nd Alternative [ ] -? [ ]?

Character Class[ ]

the literal (32₁₀ / 40₈ / 20₁₆)

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

Character Class[ ]?

?matches at most one character from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

Comment: other separators

Global pattern flags

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

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Search reference

Regular Expression

[(\d]
(?:
    \b \d{3} \)
    (?= .{3,5} \W \b )
    \g<spb> \d{3}
  |
    \B \d{2}
    (?= .{4,6} \W \b )
    \g<sp> \d{3}
)
\g<sp> \d{4} \b


(?<spb> [ ]{0,2} ){0} # separator after bracket
(?<sp> - [ ]? | [ ] -? [ ]? ){0} # other separators

New

(555) 555- 5555
(555) 555 -5555
(555)555 - 5555
(555)  555-5555

(555) 555 - 5555
(555)555-  5555
(555)  555 -5555

555-555-5555
555- 555-5555
555 -555-5555
555-555- 5555
555-555 -5555
555 - 555-5555
555-555 - 5555
555 555  5555

555 - 555 - 5555
555  555 - 5555

Regular Expressions 101

Regular Expression

Extraction