Regular Expressions 101

Group 1(\w+)

\w+any word character, repeated at least once

\s*any whitespace character, repeated any number of times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\s*any whitespace character, repeated any number of times

Group 2((?:(?!\s*\w+\s*:).)*)

Non-Capturing Group(?:(?!\s*\w+\s*:).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!\s*\w+\s*:)

\s*any whitespace character, repeated any number of times

\w+any word character, repeated at least once

\s*any whitespace character, repeated any number of times

:the literal : (58₁₀ / 72₈ / 3A₁₆)

.any character (except for line terminators)

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

(\w+)\s*:\s*((?:(?!\s*\w+\s*:).)*)

New

field1   :    value1a  value1b

field1   :    value1a  value1b   field2   : value2a value2b

field1   :    value1a   field2   : value2a value2b field3   : value3a value3b value3c