Regular Expressions 101

Pro

^start of line

Negative Lookahead(?!\D*(?:26|555))

\D*any character that's not a digit, repeated any number of times

Non-Capturing Group(?:26|555)

1st Alternative26

26the literal text 26

2nd Alternative555

555the literal text 555

Positive Lookahead(?=(?:\D*\d){5}\D*$)

Non-Capturing Group(?:\D*\d){5}

{5}repeats the group contents below exactly 5 times:

\D*any character that's not a digit, repeated any number of times

\da digit

\D*any character that's not a digit, repeated any number of times

$end of line

Character Class[\d()-]{5,10}

{5,10}matches between 5 and 10 characters from the set below:

\da digit

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

$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

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

^(?!\D*(?:26|555))(?=(?:\D*\d){5}\D*$)[\d()-]{5,10}$

New

Valid inputs:
(12345)--
---12)567)
12333
-1-2--3-45
(()))12345
((12345
(-)65768-
(4)1-2-35

Invalid inputs:
26123---
(26)897---
-26333----
26
26(((())
26------
26--345
26)88-76
267-9

Substitution

Valid inputs:
(12345)--
---12)567)
12333
-1-2--3-45
(()))12345
((12345
(-)65768-
(4)1-2-35

Invalid inputs:
26123---
(26)897---
-26333----
26
26(((())
26------
26--345
26)88-76
267-9