Regular Expressions 101

\ba Unicode word boundary

abcthe literal text abc (case sensitive)

\d+a Unicode decimal digit, repeated at least once

_defthe literal text _def (case sensitive)

Group 1(\d{2})

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

\ba Unicode word boundary

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

\babc\d+_def(\d{2})\b

New

abc1_def23
abc10_def99

abc9_def9

eeabc1_def23
eeabc10_def99