Regular Expressions 101

Pro

\d{1,2}a digit, repeated between 1 and 2 times

Character Class[\.\/-]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\d{1,2}a digit, repeated between 1 and 2 times

Character Class[\.\/-]

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:\d{4}|\d{2})

1st Alternative\d{4}

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

2nd Alternative\d{2}

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

\ban ASCII word boundary

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.

25 tokens

Regular Expression

\d{1,2}[\.\/-]\d{1,2}[\.\/-](?:\d{4}|\d{2})\b

New

01.11.11
12/22/22
12/12/1981
1*51*12
22|1|13
12.23.192
03-02-1919
1-22-12
01-23-18
03-23-1984
01.11.18
2.2.17
02.02.18
12.1.16
12.23.1943
01-23-11
12.23.19