Regular Expressions 101

Positive Lookbehind(?<=[^\W0]\w{3,14})

Negated Character Class[^\W0]

\Wany non-word character

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

\w{3,14}any word character, repeated between 3 and 14 times

\wany word character

Positive Lookahead(?=\w{4})

\w{4}any word character, repeated exactly 4 times

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

(?<=[^\W0]\w{3,14})\w(?=\w{4})

New

0001113033AA55608981 → 0001113*********8981
23456237472347823923 → 2345************3923
00000000090000000000 → 0000000009000***0000
09008000800060050000 → 09008***********0000
AAAABBBBCCCCDDDDEEEE → AAAA************EEEE
0000BBBBCCCCDDDDEEEE → 0000BBBB********EEEE

Regular Expression

Extraction