Regular Expressions 101

Group 1((?:^|[^\\])(?:\\{2})*)

Non-Capturing Group(?:^|[^\\])

1st Alternative^

^start of line

2nd Alternative[^\\]

Negated Character Class[^\\]

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

Non-Capturing Group(?:\\{2})*

*repeats the group contents below any number of times:

\\{2}the literal \ (92₁₀ / 134₈ / 5C₁₆) , repeated exactly 2 times

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

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

((?:^|[^\\])(?:\\{2})*)\$0

New

Hello '$0'. '$0' becomes the World. This shall remain \$0. Extra: \\$0 is World, \$0 is escaped.

$1World