Regular Expressions 101

Non-Capturing Group(?:^(<abc>)|\G(?!^))

1st Alternative^(<abc>)

^start of line

Group 1(<abc>)

<abc>the literal text <abc> (case sensitive)

2nd Alternative\G(?!^)

\Gstart of current search

Negative Lookahead(?!^)

^start of line

Group 2(\S+)

\S+any non-whitespace character, repeated at least once

Character Class[ \t]*

*matches any number of characters from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\ta tab character (ASCII 9)

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

Regular Expression

(?:^(<abc>)|\G(?!^))(\S+)[ \t]*

New

<abc>this is between abc</abc>
<efg>this is between efg</efg>
<abc>this is between abc</abc>
<efg>this is between efg</efg>

$1$2

<abc>this is between abc</abc>
<efg>this is between efg</efg>
<abc>this is between abc</abc>
<efg>this is between efg</efg>