Regular Expressions 101

^start of line

Character Class[1-9]{1}

{1}matches one character from the set below:

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

Non-Capturing Group(?:\d{7}|\d{5})

1st Alternative\d{7}

\d{7}a digit, repeated exactly 7 times

2nd Alternative\d{5}

\d{5}a digit, repeated exactly 5 times

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

\d{4}a 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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^[1-9]{1}(?:\d{7}|\d{5})-?\d{4}$

New

100000-0000
10000000-0000
190000000000

550000-0000
5500000000
1000000000
100000000000

11 цифр не попадают:
10000000000