Regular Expressions 101

Positive Lookbehind(?<=\d{2} )

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

the literal (32₁₀ / 40₈ / 20₁₆)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

Positive Lookahead(?=\d{4})

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

Global pattern flags

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

s modifier: single line. Allows a dot to match line terminators

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

(?<=\d{2} )\+(?=\d{4})

New

[12/Oct/2015:00:37:29 +0200]
[12/Oct/2015:00:37:x9 +0200]
[12/Oct/2015:00:37:29 +020x]