regex101: PCRE (Legacy) Match Workspace

^start of string

Non-Capturing Group(?:$\+?44$\s?|\+?44 ?)?

?repeats the group contents below at most once:

1st Alternative$\+?44$\s?

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

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

44the literal text 44

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\s?optionally matches any whitespace character

2nd Alternative\+?44 ?

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

44the literal text 44

?optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

Non-Capturing Group(?:0|$0$)?

?repeats the group contents below at most once:

1st Alternative0

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2nd Alternative$0$

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\s?optionally matches any whitespace character

Non-Capturing Group(?:(?:1\d{3}|7[1-9]\d{2}|20\s?[78])\s?\d\s?\d{2}[ -]?\d{3}|2\d{2}\s?\d{3}[ -]?\d{4})

1st Alternative(?:1\d{3}|7[1-9]\d{2}|20\s?[78])\s?\d\s?\d{2}[ -]?\d{3}

Non-Capturing Group(?:1\d{3}|7[1-9]\d{2}|20\s?[78])

1st Alternative1\d{3}

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

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

2nd Alternative7[1-9]\d{2}

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

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

3rd Alternative20\s?[78]

20the literal text 20

\s?optionally matches any whitespace character

Character Class[78]

7the literal 7 (55₁₀ / 67₈ / 37₁₆)

8the literal 8 (56₁₀ / 70₈ / 38₁₆)

\s?optionally matches any whitespace character

\da digit

\s?optionally matches any whitespace character

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

Character Class[ -]?

?matches at most one character from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

2nd Alternative2\d{2}\s?\d{3}[ -]?\d{4}

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

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

\s?optionally matches any whitespace character

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

Character Class[ -]?

?matches at most one character from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

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

$end of string, or before its final line terminator

Search reference

Regular Expression

^(?:\(\+?44\)\s?|\+?44 ?)?(?:0|\(0\))?\s?(?:(?:1\d{3}|7[1-9]\d{2}|20\s?[78])\s?\d\s?\d{2}[ -]?\d{3}|2\d{2}\s?\d{3}[ -]?\d{4})$

Unit Tests

There are no unit tests, click to add some.