Regular Expressions 101

^start of line

Non-Capturing Group(?:[Dd][- ]?)?

?repeats the group contents below at most once:

Character Class[Dd]

Dthe literal D (68₁₀ / 104₈ / 44₁₆) (case sensitive)

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case sensitive)

Character Class[- ]?

?matches at most one character from the set below:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

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

26 tokens

Regular Expression

^(?:[Dd][- ]?)?\d{5}$

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