Regular Expressions 101

Pro

\da Unicode decimal digit

Positive Lookahead(?=\d{0,3}[a-z])

\d{0,3}a Unicode decimal digit, repeated between 0 and 3 times

Character Class[a-z]

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

Character Class[a-z\d]{4}

{4}matches exactly 4 characters from the set below:

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

\da Unicode decimal digit

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

\d(?=\d{0,3}[a-z])[a-z\d]{4}\d

6accd76,64c7c8,6777c8
0e4f9a4fdcfb351397b65cdcabcd0673d768cf59

6accd76,64c7c8,6777c8
0e4f9a4fdcfb351397b65cdcabcd0673d768cf59