Regular Expressions 101

1st Alternative\d{2}\/[a-zA-Z]{3}\/\d{4}

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Character Class[a-zA-Z]{3}

{3}matches exactly 3 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

2nd Alternative\d{2}\/\d{2}\/\d{4}

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

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

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

\d{2}\/[a-zA-Z]{3}\/\d{4}|\d{2}\/\d{2}\/\d{4}

20/dec/2018
30/mar/2017
30/03/2017
29/feb/2000