Regular Expressions 101

Invoice the literal text Invoice (case sensitive)

Group 1((?:[0-9]){8})

Non-Capturing Group(?:[0-9]){8}

{8}repeats the group contents below exactly 8 times:

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

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

Invoice ((?:[0-9]){8})

New

THIS IS AN EXAMPLES OF Invoice Email Subject sample
Harmonie Mutuelle - Invoice 1234567890123456